It is different because to find out the answer, change all denominators to 10, since the LCD is 10.
6/10-5/10=1/10
6/10-6/10=0/10
1/10 is not equal to 0/10
Answer: a collision damage waiver
Mean, m = 18 in
Standard deviation, SD = 2.2 in
Range: 16 ≤ X ≤ 21 in
Calculating Z value,
Z = (X-m)/SD
Then,
Z1 = (16-18)/2.2 ≈ -0.91
Z2 = (21-18)/2.2 ≈ 1.36
From Z table, and at Z1 = -0.91, and Z2 = 1.36;
P(16) = 0.1814
P(21) = 0.9131
Therefore,
P(16≤X≤21) = 0.9131 - 0.1814 = 0.7317
The probability that a child selected randomly measures between 16 and 21 in is 0.7317.
Answer: a) 13 macaroons
b) 6 cookies
Step-by-step explanation: Total = $10
a) $2.20/slice of pie
$0.60/macaroon
10 - 2.20 = 7.80
7.80/0.6 = 13
b) $4.60/loaf
cookies = 1 1/2*macaroons = (1 + 0.5)*0.6 = 1,5 * 0.6 = 0.90
cookies = $0.90
10 - 4.60 = 5.40
5.40/0.9 = 6
C. because 8/8 is equal to 1 and 3 1/4 x 1 is 3 1/4
