8. What is the instantaneous velocity for f(t) = t^2+ 3t at t = 4 seconds? 5
15
21
17

Velocity is the time rate of change of distance[f(t)]

df(t)/dt = 2t + 3

At t= 4

V = 2(4) + 3

V= 11ms-¹.

Now this is only correct if i'm working with the values you gave.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %