# What Does Minus 90 Mean On Here

What's \$90 minus 25% off?

Well, 24% off means you pay 75%... Google this:
75% of 90

Here's a link if you're too lazy:

90 minus 25% of 90

What does plus equals minus k (+=-k) mean?

Ok, you must be looking at a programming language, in his case, it looks like C++

In this case then, it is an operator, a compound operator:

Compound assignment (+=, -=, *=, /=, %=, >>=, <<=, &=, ^=, |=)

When we want to modify the value of a variable by performing an operation on the value currently stored in that variable we can use compound assignment operators:

expression is equivalent to
value += increase; value = value + increase;
a -= 5; a = a - 5;
a /= b; a = a / b;
price *= units + 1; price = price * (units + 1);

Here is an example of a program snippet that uses this compound operator:
// compound assignment operators

#include
using namespace std;

int main ()
{
int a, b=3;
a = b;
a+=2; // equivalent to a=a+2
cout << a;
return 0;
}

What does it mean when someone says "t minus 14 hours until _____"?

They are referring to the use of t-sub-zero to mark the beginning of the launch time. From a physics point of view, it doesn't matter that launch time is 10:30 am EST. The launch time is t-sub-0. Fourteen hours before launch time is t-sub-0 minus 14 hours. Two minutes after launch time is t-sub-0 plus two minutes.

We shorten this to "t minus 14 hours" or "t plus 2 minutes." You don't hear the latter too much, but if you read a NASA flight document, it shows things happening in terms of how much time after launch.

Things that happen in t-plus time have to do with where you are in orbit around the Earth, and when rockets fire, and when a rocket hits q-max and stuff. Things that happen in t-minus time are prep things. The rocket isn't going anywhere, but you have to finish filling the tanks of liquid fuel, load the astronauts, do launch checks, and these have a schedule relative to the launch time.

What does "t-minus whatever" mean?

T means time. Specifically, it means the time at which something happens.Negative numbers mean the time before the event happens, positive numbers mean the time after it happens.I'm leaving Portland for Canada at 2 PM on Saturday. As I write this, we're at a time before I leave. T is 2PM Saturday, and right now is about 41 hours before then, so this is 41 hours before T, or T-41 hours.I will arrive in Canada 8 hours after I leave. The time I leave is T, so my arrival will be 8 hours after T, or T+8 hours.

What does negative longitude mean?

Latitude designates North and South of the Equator. Longitude designates East and West of the Prime Meridian. A negative latitude means South of the Equator, and a negative longitude means West of the Prime Meridian.Location data is often represented in the form of latitude and longitude pairs like below:37.427619, -122.166972[Hoover Tower, Stanford University]The simple framework below can help you decode the location pairs.+ + : North and East + -  : North and West - -   : South and West - +  : South and EastNote that the centerpoint for this framework is 0,0 where the Prime Meridian and the Equator intersect, in the Gulf of Guinea.

How do you minus a percentage?

60 x 20% = 12
60 - 12 = 48

What does negative numbers on the decibel scale mean?

I’m guessing you might be seeing this on a power amp, or on recording meters. In this case, zero dB represents the point at which clipping occurs. Clipping refers to the fact that you’ve reached the limits of the equipment, the peak, where your sinusoidal wave “clips” and becomes a square wave. It’s reached the top, and so flattens out. This is distortion. This is why you want to stay below zero dB. Square waves can also damage speakers.Say you have a 300 watt amplifier. When your outputting 300 watts, you’re at zero db. Reduce output to -3 dB, and you’re outputting 150 watts. Being a logarithmic scale, each 3 dB represents a halving, or doubling, of the power output.

What is meant by a negative power factor? When does it occur? Why? What's an example?

Power factor is nothing but cosine of angle between Voltage phaor and Current phasor.Now Inductive circuit has lagging pf which means current lags voltage. The angle between voltage and current phasor in simple inductor-resistor circuit always less than 90. Thus cos of this angle always positive. Now Capacitive circuit has leading pf. Current leads voltage. If current taken as reference voltage phasor will be at minus theta angle. This negative theta is always greater than minus 90 degrees in case of simple capacitor-resistor circuit. Now let's calculate power factor. Cos of minus theta equal to cos of theta which is positive again. How we will recognise wheather it is lagging pf or leading pf ? We simply put lead orlag word before the pf value.Negative power factor will happen when the angle theta goes beyond plus 90 to minus 90 range. 2nd and 3rd quadrant. When will this occure ? When an AC motor connected to infinite bus upon sudden variation starts working as generator or AC generator connected to infinite bus upon sudden variation starts working as motor negative power factor happens.Why this happens ? I'll try to explain this without involving machine theory much.Generator generally supplies electrical power. Due to abrupt changes It starts consuming power from the bus instead of supplying ! Motor generally consumes power and when it starts supplying power power factor negative. Power for AC machine = 3V*I*cos thetaFor generator power is positive during normal operation. When abrupt change occures power negative means power getting consumed. Means in above power equation cos theta is negative. Theta is beyond 90 . Similar kind of explaination for motor. That's negative power factor.

If under my breast measured 26 inch and around my bust measured 31 inch.. what cup size do I have?

Adding inches was done before bras had elastic and could stretch, so that method doesn't apply to modern bras. Unfortunately, the smallest band size available tends to be a 28, so the band may still be a little too large, but a 28 band should fit a lot better than a 32.

You should try a 28D. It has the same cup volume as a 32B, but on a smaller band. It is important to wear the right band size because it offers 80-90% of the bra's support.

Bra fitting video:
http://brastop.com/fitting_room.aspx

Online stores that carry 28Ds:
lovebras.com
brastop.com
bravissimo.com
figleaves.com
herroom.com
barenecessities.com
biggerbras.com
Also, check ebay for cheap prices

At what angle is the work done by a body at its minimum, W=F×S Cos thetha?

Work done: W = F*S*cos(theta)W is positive when 0° < theta < 90°W = 0 [when theta= 90°]W is negative when 90° < theta < 180° .Negative W means that the work is done in the opposite direction of the displacement, but doesn't mean it is the least because it is negative but it just means that it is in the opposite direction.This is a common misconception here. If you reverse the sign convention of the directions of motion and force, and then observe the work done, you'll find that the positive work done, which you got in the first case, will be negative in the reversed case. It's a matter of the convention you take. But the minimum in any case is no work done at all.So the minimum work done will be 0 (i.e; when theta = 90°).Hope you find it useful.