Please help . please and thanks ​

3rd option

Step-by-step explanation:

Given the x- intercepts are x = - 3 and x = 5then the corresponding factors are

(x - (- 3)) and (x - 5) , that is (x + 3) and (x - 5) , then

f(x) = a(x + 3)(x - 5) ← a is a multiplier

To find a substitute (1, 8) into the equation

8 = a(1 + 3)(1 - 5) = a(4)(- 4) = - 16a ( divide both sides by - 16 )

- 0.5 = a

f(x) = - 0.5(x + 3)(x - 5)

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles