Amy worked 22 hours last week and earned $231. At that rate, how much will she earn if she worked a full 40 hours?

Did everyone what she made by hours worked to find her hourly rate:

231 / 22 = 10.50 per hour

Multiply her hourly rate by number of hours:

10.50 x 40 = 420

She would earn $420

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: