PLEASE HELP PLEASEE. Suppose the mass of a car is 1200 kg and the mass of the driver is 65 kg what is the total combined mass of the car and driver, expressed with the correct number of significant figures?

In a laboratory, nakisha mixes sodium hydroxide solution with an indicator called phenolphthalein. when combined, they create a pink solution. nakisha wonders if mixing other solutions with phenolphthalein will also create this pink color. how could she use the scientific inquiry process to explore it further?

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.