Write the number in standard notation. 6.43 * 10^-4

a. 0.0000643

b. - 257.2

c. 0.000643

d. 0.00643

Which is more, 2 1/2 pounds or 36 ounces?

Find the area and the circumference of a circle with radius 9m. use the value 3.14, and do not round your answers. be sure to include the correct units in your answers.

A radio is being discounted 20% if the sale price of the radio is $51.44 what is the original price of the radio Radio is being discounted 20% if the sale price of the radio is 51.44 cents was the original price of the radio

The Ratio of roses to snapdragons was 4 to 5. If there were 26,000 roses on the float, how many snapdragons were there?

D/dt integral from 0,2x of (e^t+2t) dt is?

cual de dos amigo come más pizza:el que come la cinco sextas partes de la mitad de pizza, o el que come las tres cuartas partes de lo que dejó el primero?

Compare the graph of f (x) = 6^x and the graph of g (x) = 6^x-12.

A bathtub contains 20 gallons of water. After the drain is opened, there are 14 gallons of water remaining after 30 seconds.

The manager of fantatasy flowers made 8 bouquet of wildflowers. By noon she sold 2 of the bouquets. What fraction did she sell?

If the area of a living room wall is 70 square feet, how many feet long is the living room wall