If y varies directly with with x and y=20 when x= 2.5, what is the value of y when x = 8? (type the numerical value of x only)

The track team ran a mile and a quarter during their practice how many kilometers did her team runs?

Will give brainliestbased on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m?

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g