21. An unknown substance from planet X has a

density of 10 g/mL. It occupies a volume of 80

mL. What is the mass of this unknown

substance?

a. 8 g

b ...125 g

c. 80 g

d. 800 g

What is the exact value of the expression √486-√24+√6? Simplify if possible.

Solve 7w = 56, where w is a real number. Round your answer to the nearest hundredth. If there is more than one solution, separate them with commas. If there is no solution, click on "No solution".

Edwin says that when (x + 2) 2 = 49, that x + 2 = 7.

Writeca number sentence that shows an estimate each answer ... 69 + 25

Which solid figure has 4 faces that are triangles and 1 face that is a rectangle?

Solve. Write the solution set in interval notation. x + 7 ≥ 4x - 2

The histogram below shows information about the hours students spent exercising in a week: A histogram is titled Weekly Exercise, the horizontal axis is labeled Hours of Exercise, and the vertical axis is labeled Students.

What is the rule for 24, 48, 72,

Eight more then the number Let n represent an unknown number

Yoku Is putting on sunscreen. He uses 2 ml to cover 50 cm² of his skin. He wants to know how many milliliters of sunscreen he needs to cover 325 cm² of the skin.