An electrician paid $398.40 total for 1,000 feet of wire. How much does he have to pay per foot a wire?

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year. how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.

Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?