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3 years ago

10

Clare estimates that her brother is 4 feet tall. When they get measured at the doctor's office,

1 answer:

avanturin [10]3 years ago

5 0

Answer:

2 inches

Step-by-step explanation:

Since his actual height was 4 feet and 2 inches, instead of the estimate of 4 feet, the difference was 2 inches.

This means the error in inches was also 2 inches, since the estimated height was 2 inches lower than the one at the doctor's office.

So, the error is 2 inches

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A pro baseball team is having a promotion in which every 10th fan that enters the stadium gets a free hat and every 12th person

mixas84 [53]

Multiples of 10 = 10, 20, 30, 40, 50, 60
This means the 10th, 20th, 30th, 40th, 50th, 60th, ... fan will get a free hat.
Multiples of 12 = 12, 24, 36, 48, 60
This means the 12th, 24th, 36th, 48th, 60th, ... fan will get a free shirt.
So the 60th fan will receive both a hat and a shirt.
Meaning 60 fans will come to the stadium before a fan receives both a hat and a shirt.

3 0

3 years ago

Solve for x in the equation 3 x squared minus 18 x + 5 = 47.

ryzh [129]

Answer:

x= 3 + $\sqrt{23}$ , 3 - $\sqrt{23}$

Step-by-step explanation:

You use the quadratic formula to get x= $\frac{18+6\sqrt{23} }{6} ,\frac{18-6\sqrt{23} }{6}$

Then you simplify and get the answers x= 3 + $\sqrt{23}$ , 3 - $\sqrt{23}$

6 0

3 years ago

Read 2 more answers

The perimeter of an equilateral triangle is 13 inches more than the perimeter of a square, and the side of the triangle is 6 in

ss7ja [257]

Answer:

The side of the triangle is 11 inches

Step-by-step explanation:

please kindly see the attached files for explanation

8 0

3 years ago

HELP!!! STATS!!!

Vadim26 [7]

Answer:

The 99% confidence interval is $165.776 < \mu < 180.224$

Step-by-step explanation:

From the question we are told that

The sample size is n = 100

The sample mean is $\= x = 173 \ days$

The population standard deviation is $\sigma = 28 \ days$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 99 ) \%$

=> $\alpha = 0.01$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{\sigma }{\sqrt{n} }$

$E = 2.58 * \frac{28 }{\sqrt{100} }$

=> $E = 7.224$

Generally 95% confidence interval is mathematically represented as

$\= x -E < \mu < \=x +E$

=> $173 -7.224 < \mu < 173 + 7.224$

=> $165.776 < \mu < 180.224$

4 0

3 years ago

Is 1.8 repeating rational or irrational number

Yuliya22 [10]

Answer:

Irrational number

Step-by-step explanation:

The number 1.8 isn't repeating so it wouldn't be a repeating rational number.

8 0

3 years ago