(2A.6L, 6H) The time, t, needed to travel a certain distance varies inversely with the rate, r, of speed. If
it takes 8 hours to travel a certain distance at 36
miles per hour. Write the equation and solve to find
how long it takes to travel the same distance at 48
miles per hour.
A. 6 hours
B. 1 hour
C. 11 hours
D. 5 hours
B

sorry i just need to anwers this to get points

step-by-step explanation:

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places