30 POINTS. OLD QUESTION. SCIENTIFIC NOTATION. Explain Sylvia’s processes. Is Sylvia correct? If not where did she go wrong?

Explain Dylan’s processes. Is Dylan correct? If not where did he go wrong?

Explain Ethan’s processes. Is Ethan correct? If not where did he go wrong?

Plz help.

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

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