P(-2.57 ≤ Z ≤ 1.27) = P(Z ≤ 1.27) - P(Z ≤ -2.57)
P(Z ≤ 1.27) = 0.8980
P(Z ≤ -2.57) = 1 - P(Z ≤ 2.57) = 1 - 0.99488 = 0.00512
P(-2.57 ≤ Z ≤ 1.27) = 0.8980 - 0.00512 = 0.89288
0.8929 (4 d.p.)
4x+y = 20
3x+y = 2
4x+y-3x-y = 20-2
x = 18
3x+y = 2
3.18 + y = 2
54 + y = 2
y = -52
120 pens for $24 is not a unit rate to describe this sale.
Answer: The percent that you get your first heads on the 6th toss is about 2.26%.
To reach this event, you would have to flip a tails 5 times in a row. Then, you would have to flip a heads.
If we multiplied all the percent together, it would look like:
0.55 x 0.55 x 0.55 x 0.55 x 0.55 x 0.45
Multiplying those gives a value of 2.26%.
Answer:
a
Step-by-step explanation:
there are 4 quarts in a gallon.
4 times $0.79 =$3.16