Justin can solve 900 math problems in 30 minutes. Steve can solve 400 math problems in 20 minutes how many math problems can each of them solve in one minute

A sunscreen preparation contains 2.40 % by mass benzyl salicylate. If a tube contains 3.0 oz of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture 425 tubes of sunscreen?

Which of the following examples could correctly show the mean density of lunar soil? 3.24 cubic centimeter 3.24 grams per square centimeter 3.24 cubic centimeter per gram 3.24 grams per cubic centimeter

On day 1, the penalty is $0.01. On day 2, the penalty is $.02. On day 3 the penalty was $.04, on day 4 the penalty was $.08. Doubling in amount each additional day late, what is the equation?

Using all four of the digits 5,6,7,9 and any of the 4 operations, +,-, division, and x can you make 36

In a recent 10-year period, the change in number of visitors to U. S national parks was about - 11,150,000 visitors what is the yearly change in the number of visitors

4a - 18=6a+4 what is a

What is the greatest common factor of 6x^4 + 24x^3 - 72x^2?

Is 4 the solution to - 2x+5=-3

Solve: 8+4/5 (15+2x) = -12 What should we do first? Finish solving it and what do you get for x? 1. - 20 2. 5 3. - 2

382.993 rounded to the nearest hundredth?