Suppose the function h(t) gives the heart rate of a runner at various points in time during a 20 mile run. Select an appropriate domain for this function. Assume that the runner completed the 20 mile run in 129 minutes.

A) The domain is all rational numbers, t, such that 0 _< t _< 129

B) The domain is all rational numbers, t, such that 0 _> t _> 129

C) The domain is all integers, t, such that 0 _< t _< 129

D) The domain is all integers, t, such that 0 _> t _> 129

i dony know

step-by-step explanation:

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8

what's the question?

step-by-step explanation:

there is no question.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4