An education researcher randomly selected 48 middle schools from across the country and interviews every teacher of the selected schools. Which sampling method did he use?

Jack rode his bike to school at 12 mph and then jogged back at 6 mph. If the round-trip took him six hours, how far was it to school?

The markup over dealer's cost of a new car ranges from 11% to 21%. If the sticker price is $16,000, over what range will the dealer's cost vary?

The sum of 2 interior angles of a triangle is 140°. What is the measure of the third interior angle? A. 220° B. 40° C. 30° or D. 50°?

Work out the area of this circle with a radius of 6mm. Give your answer in terms of pi

It was 6 feet long! When the sandwich arrived, Zachary cut it into 16 equal pieces. How long was each piece?

Explain in words how to change a fraction to a percent

There are 3 strawberry ice creams, 4 chocolate ice creams, and 7 vanilla ice creams on a tray. barbara selects 2 ice creams at random without replacement. what is the probability that she selects 2 chocolate ice creams?

Sandy works at a store that sells clothing accessories. The supply function for scarves is P = Q-9, where Pis the price and Q is the quantity of scarves. If Sandy sells the scarves for $12 apiece, how many scarves will the store supply?

Store A: $25 for a 45 minute lesson Store B: $30 for a 1 hour lesson Store C: $45 for a 1.5 hour lesson Store D: $80 for three 1 hour lessons Julie wants to purchase swim lessons for her son. There are four different stores that offer swim lessons.

What percent of 123 is 140