How much data is needed to have a representative sample of the population?

1. 10 to 20 items.

2. At least 100 items.

3. All of the population.

4. It depends on the size of the population.

7731 rounded to the nearest 10

15x^3+52x^2+32x What is this completely factored

A student has $30. Berries cost $3 per pound. Which inequality shows n, the possible value for the number of ponds he can buy?

The size,? S, of a tumor (in cubic millimeters) is given by?=2? S = 2 t, where? t is the number of months since the tumor was discovered. Give units with your answers. (a) What is the size of the tumor right after 9 months?

What operation will you perform to solve the expression 4 * 16^3 + 10?

The Rodriguez family went to dinner at Pasta Palace. Mr. Rodriguez ordered a meal for $6.25; Mrs. R ordered a meal for $7.50; the 2 children ordered individual pizzas for $4.99 each. The sales tax rate was 7.25% and they left a 15% tip.

If people blink about 13 times per minute, how many times do they blink in 7 hours?

Shawn made fudge brownies and peanut butter brownies. Each batch of fudge brownies makes 9 pans. Each batch of peanut butter brownies makes 7 pans. Shawn made 13 batches and ended up with 97 pans of brownies.

Twelve cubic inches of soda are left in a can that holds 20 cubic inches. What percent of the soda has been drunk? What percent of the soda is left in the can?

Is it true that (x+4) = x² + 16? Explain.