Which expression is correctly written in scientific notation? A. 398 x 10^1 B. 39.8 x 10^2

C. 3.98 x 10^4 D. .398 x 10^3

Need answer ASAP

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Why did the ice arena get so hot after the big game (this is math related google it to find the paper

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)