The actual depth of a lake is 15.8 meters. Jada measured the depth of the lake to be 16 meters.

By how many meters does the measured depth differ from the actual depth?

Explain or show your reasoning.

What is the square root of 45? (step by step working plz)

Suppose i pick a jelly bean at random from a box containing one red and eleven blue ones. i record the color and put the jelly bean back in the box. if i do this three times, what is the probability of getting a blue jelly bean each time? (round your answer to three decimal places.)

Peter measures the angles in a triangle. he finds that the angles are 95, 10 and 75. is he correct? explain your answer