Grade 7 Unit 4 Lesson 7 Homework 3 of 43 of 4 Items

Item 3
Last week, the price of oranges at the farmer's market was $1.75 per pound. This week, the price has decreased by 20%. What is the price of oranges this week?

a. What is the dollar amount representing the 20% decrease? Hint: multiply the amount per pound by the percent in decimal that was decreased.

cents

b. What is the price of oranges this week?

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you are in 7 class

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you are problems in mathematics

answer: 2/4

step-by-step explanation:

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: