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

Identify the random variable as discrete or continuous: number of passengers in a car that enters a uh parking garage.

Write 3.11 as a mix number and a improper fraction?

After school in friday, Lamar Walked to the corner Store and bought 2 candy bars for $0.97 each and a soda for $1.41. what was his total purchase

Select all that apply. Which equations could you use to solve the following problem? Seventy-eight is 55% of what number? 78 = (0.55) w p = (0.85) 78 x/18=55/100 78/x=55/100

One less than the product of one and a number X

A 9-cm chord is 11 cm from the center of a circle. What is the radius of the circle? C. 13.0 cm B. 11.9 cm A. 9.0 cm D. 14.2 cm

What is the percent of change from 180 to 387

A value one standard deviation from the mean is less likely to occur than a value three standard deviations from the mean. True or False?

Eight times what equals 565

A rectangular window is 4 ft long and 3 ft wide. Jane would like to buy a screen for the window. The cost of the screen is based on the number of square inches the screen is. Use the facts to find the area of the window in square inches.