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shutvik [7]
3 years ago
11

HELP THIS IS URGENT!!!!!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Levart [38]3 years ago
5 0
Try using photo math Comes in handy
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At dinner, the meal cost $22 and a $1.87 sales tax was added to the bill. What would be the total amount if the meal cost $80.
Helen [10]
1.87 is 8.5% of 22 so 8.5% of 80 is 0.085 x 80 so $6.80
3 0
2 years ago
5 times 8/7 FOR MAtH
aleksklad [387]

Answer:

40/7  =   5 5/7

Step-by-step explanation:

4 0
3 years ago
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50 points
mixas84 [53]
I believe it’s b I am not sure
Step by step explanation
8 0
3 years ago
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A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0
2 years ago
Aaron puts $1,000 in an account that pays 10% interest compounded quarterly. He leaves it in the account for six months. Estimat
Keith_Richards [23]
I think its C or D... idk hope it helps tho
3 0
3 years ago
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