What is factor of 4x+2y=

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

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