A bridge must be built across a river spanning 80 feet across the rivers bottom the engineers built the bridge using arches . The bottom of each arch rest on the bottom of the river. The distance from the bottom of each arch to the top must be 100 feet. Based on the diagram of the bridge did the engineers of the bridge succeed in making the e top of the bridge 100 meters above the rim bottom |a|= 1

I'm not sure but i think it's 1670km/h

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

Ithink it’s d as the answer.