Gavin paid for 4 pounds of bananas with a $10 bill he was given back $6.40 what was the cost of 1 pound of bananas write an equation that has a variable

the equation is 4t = 3.60

The cost of 1 pound of banana is $0.9

Step-by-step explanation:

Let t represent the cost of 1 pound of banana in dollars.

Gavin paid for 4 pounds of bananas. This means that the total cost of 4 pounds of banana will be 4× t = $4t

He gave a $10 bill to the seller and he was given back $6.40. This means that the actual cost of 4 pounds of banana would be

10 - 6.40 = $3.60

Therefore,

4t = 3.60

t = 3.60/4 = $0.9

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:

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