Find the length of the curve. r(t) = 3t, 3 cos t, 3 sin t , −4 ≤ t ≤ 4

we are given

we can compare it with

we get

now, we can use length formula

now, we can find x' , y' and z'

now, we can plug values

and we get

now, we can simplify it

we get

............Answer

which expression can be used to convert 80 us dollars (usd) to australian dollars (aud)?

1 usd = 1.0343 aud

1 aud = 0.9668 usd

step-by-step explanation:

sorry just need the points

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a