Three times the sum of the opposite of a number and -7

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.