Write and evaluate the expression. Then, select the correct answer. Ten times the sum of seven and a number; evaluate when j= 1

Evaluate cos2θ for cosθ = square root of 3/2

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z

Which expression is a perfect cube? a. x8 b. y24 c. m28 d. x64