<span>solution:
we have, mean =8.4 hrs, std. deviation = 1.8 hrs, sample size n = 40 , X = 8.9
Probability(X<8.9) = ?
we know that, Z = (X - mean)/(std. deviation/(sqrt. n)) = (8.9 - 8.4)/(1.8/(sqrt.40))
Z = 1.7568
from standard normal probabilities table, we have , P(Z<1.7568) = 0.9608
Hence, probability that the mean rebuild time is less than 8.9 hours is 0.9608</span>
The very last one is the answer!!
1/2 times 3/10 = 15/10 is equivalent to 1 and 1/2 or 1 and 5/10
9514 1404 393
Answer:
4x^2 +16x +42 +92/(x -2)
Step-by-step explanation:
Synthetic division tells you the quotient is 4x^2 +16x +42 with a remainder of 92. To check this, we can multiply the quotient by the divisor and add the remainder:
(x -2)(4x^2 +16x +42) +92
= x(4x^2 +16x +42) -2(4x^2 +16x +42) +92
= 4x^3 +16x^2 +42x -8x^2 -32x -84 +92
= 4x^3 +8x^2 +10x +8 . . . . . the original dividend, as required