Pump 1 can emty a pool in about 8 hours while pump 2 can empty the same pool in 9 hours. If the two pumps worked together how long would it take them to empty the pool?

about 4 hours
about 4 hours and 15 mins
about 4 hours and 30 mins
about 4 hours and 45 mins

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

answer: ur v dumb

step-by-step explanation:

if x = 1, then the answer is 3.5