Round your answer to the nearest hundredth angleB =

Use law of sine

sin90/9=sinB/4

4sin90/9=sinB

sin^-1(4sin90/9)=(sinB)sin^-1

=26.3877999612

26.39 degrees

i dont know

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.