Show an equation and a solution for the problem. Arnold needs a 25% solution of nitric acid. He has 20 milliliters (ml) of a 30% solution. How many ml of a 15% solution should he add to obtain the required 25% solution?

A researcher wants to determine the impact of soil type on the growth of a certain type of plant. She grows three plants in each of four different types of soil and measures the growth in inches for each plant after one month resulting in the data

An animal that eats the dead remains of waste and other animals and plants

Estimate the unit rate is 12 pair of socks sale for $5.79

What is the greatest common factor of 76 and 114

Subtract 2x^2 - 3x+5 from 4x^2-5x+10

Five cats each ate 1/4 cup of canned food and 1/4 cup of dry food. how much food did they eat altogether

Solve on the interval [0, 2Pi): 1 + cos (theta) = (sqrt (3) + 2) / 2 A. Pi/6, 5Pi/6 B. Pi/3, 5Pi/3 C. Pi/6, 11Pi/6 D. 7Pi/6, 11Pi/6

Eli invested a total of $2000 in two stocks. One stock cost $18.50 per share, and the other cost $10.40 per share. Eli bought a total of 130 shares. Write and solve a system of equations to find how many shares of each stock Eli bought.

The length of a rectangle is 12 inches longer than the width. Find the length and width if the perimeter is 184 inches.

X+8 > 18 how do you solve it