The mean mark for the class was 70%. There are 30 students in the class, 20 of whom are boys. The mean mark for the boys is 62%. What is the mean mark for the girls?

What is the definition of exponential decay?

Given: ΔXYZ AB is a midsegment parallel to XY. The slope of AB is 2 3. What is the slope of XY?

Two angles are complementary. The larger angle is 6 more than twice the smaller angle. Write an equation to find the measure of each angle.

Which is greater 7,500,000m or 750km

Carlos wants to buy a new t. v. He is willing to spend less than $600 for 36" or smaller or more than $2000 for 42" or larger. He has a gift certificate for $400. How much more will he have to spend for either t. v?

Solve the system of equations. - 4x + 11y = 15 x = 2y y = x=

At an IMAX theater, the giant rectangular movie screen has a width 26 feet less than its length. If its perimeter is 332 feet, find the length and the width of the screen.

A teen estimates that she sleeps 8 hours per day. What fraction of the day does the teen sleep? Write the fraction in simplest form.

A.) In 2004, it was reported that "the relationship between body mass, MM, and standard metabolic rate, BB, among living organisms remains controversial. However, in many cases BB is approximately proportional to the three-quarters power of MM.

A television weighs 8.50 pounds. How many grams is this? (Hint: You need to use two unit conversion fractions. 1 pound equals about 0.454 kg.)