Question

A strand of hair has an average mass of 2.17 × 10-5 ounces. A grain of rice has an average mass of 0.002
ounces. How much heavier is a grain of rice than a strand of hair? Express your answer in scientific notation.
(1 point)

? x ? ounces

Answer 1

Light travels at an approximate rate of 1.9 × 10 mi./sec. There are about 3.2 x 107 seconds in a vear. About
how many miles does light travel in a year? Write the answer in scientific notation. Express the answer to the
exact decimal place. (1 point)

? miles