An item was bought for RM 3500. The retailer sold the item at a 15% discount but still maintained a gross profit of 20% on the net retail price. At what price did he list the item?

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step-by-step explanation:

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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:

they charge the same amount at 20 minutes.

step-by-step explanation:

27 +27 or 27times 2=54

the diffrence is 0