What is ratio of 28 red pens and 84 black pens

A chemist is using 363 milliliters of a solution of acid and water. If 19.5% of the solution is acid, how many milliliters of acid are there? Round your answer to the nearest tenth. 7080 milliliters

Solve for c? 2x+36x-15c=x

A volleyball playoff competition has eliminations each round. The table below shows the number of teams in each round of the tournament: Round (x) 1 2 3 4 Teams f (x) 16 8 4 2 Compute the average rate of change of f (x) from x = 1 to x =

If J=82, L=57, and K=41, list the sides of JLK in order from smallest to largest.

Given right triangle JKM, which correctly describes the locations of the sides in relation to ∠J?

Write the equation of the line whose slope is 1/3 and y-intercept is - 3. Write the answer in slope-intercept form.

Last week, Rick's Math Website had the following number of visitors: Monday = 250, Tuesday = 501, Wednesday = 260, Thursday = 490 and Friday = 711. About how many visitors came to Rick's Math Web last week?

For each cost function (given in dollars), find (a) the cost, average cost, and marginal cost at a production level of 1000units; (b) the production level that will minimize the averagecost; and c) the minimum average cost.

The sum of three numbers is 6. the third number is the sum of the first and second numbers. the first number is one more than the third number. Find the numbers

What is the final amount if 975 is increased by 1% followed by a further 9% increase? Give your answer rounded to 2 DP.