Radio waves travel at the speed of light, which is 3.00 × 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 × 108 km from Earth?

Which one of the following formulas of ionic compounds is the least likely to be correct?

A dose of medication was prescribed to be 35 microliters. Which of the following expresses that volume in centiliters?

Which of these quantities represents the largest mass?

The recommended daily allowance (RDA) of calcium is 1.2 g.Calcium carbonate contains 12.0% calcium by mass.How many grams of calcium carbonate are needed to provide the RDA of calcium?

A ladder 20 feet long is leaning against the wall of a house (see figure). The base of the ladder is pulled away from the wall at a rate of 2 feet per second. How fast is the top of the ladder moving down the wall when its base is 13 feet from the wall? Round your answer to two decimal places. ​ ​

An airplane flies at an altitude of 6  miles towards a point directly over an observer. Consider  and  as shown in the following figure. The speed of the plane is400 miles per hour. Find  when  miles. Round your answer to three decimal places. ​ ​

Find the derivative of the function. ​ . ​

All edges of a cube are expanding at a rate of 7  centimeters per second. How fast is the volume changing when each edge is 2  centimeters? ​

An airplane is flying in still air with an airspeed of 283  miles per hour. If it is climbing at an angle of 21 °, find the rate at which it is gaining altitude. Round your answer to four decimal places. ​