The width of a certain cell is  2 × 10−6 cm. If we placed 450 of these cells side by side, how long (in centimeters) would that line be? Express this length without using scientific notation.

Alex uses the length of his hand to measure the size of his desk. He finds the top of his desk to be about "2.5 hands by 9 hands" in size. Bianca uses her hand and finds the same desk to measure about "4 hands by 14.4 hands" in size. Alex's hand is how many times as long as Bianca's hand?  times as long    What is the measure of Alex's hand using Bianca's hand as the "unit ruler"?     Bianca's hand is how many times as long as Alex's hand?  times as long    What is the measure of Bianca's hand using Alex's hand as the "unit ruler"?

The approximate areas of two states are listed below. 41 Texas: 2.69 x 10° square miles • Rhode Island: 1.21 × 10° square miles Determine the difference, in square miles, between the area of Texas and the area of Rhode Island. Write your answer in scientific notation. Show your work.

How many kilometers long is a football field? (A football field is 100100 yards long.) (Use decimal notation. Give your answer to four decimal places.)

how many boards, each 2 feet 8 inches long, can be cut from a board 16 feet long

(c) Let f(x) and g(x) be nonzero polynomials in R[x], of degrees m and n, respectively. Prove that deg(f(x) g(x)) = m + n. (d) Give a counterexample to the multiplicative inverse law for the ring R[x] of polynomials in x with real coefficients. Explain why your counterexample works.

Find volume

The length of one edge of a cube is 228 pm. What is the volume of the cube in cubic centimeters? Report your answer using scientific notation (e.g., 1.23e15 or 1.23e-15) to the hundredths place and do not include units.

On a map, two cities are 1 1/2 inches apart. If 3/8 inches on the map represents 25 mi, find the number of miles between the two cities.

You need a fish tank that can hold 9792 cubic inches of water. If the tank is to be 34in. long and 24in. wide, how tall will it need to be?