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2 years ago

Three boxes of baseball cards weigh 99 pounds how many pounds do 4 boxes weigh

Mathematics

2 answers:

Anna007 [38]2 years ago

8 0

Answer:

132

Step-by-step explanation:

99 divide by 3 equals 33.

33 times 4 equals 132

ivolga24 [154]2 years ago

3 0

99 ÷ 3 = 33 so each box weighs 33lbs or pounds each

so 33 × 4 = 132 pounds
or
99 + 33 = 132 pounds

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iogann1982 [59]

Answer: the answer is C

Step-by-step explanation: we know this because a straight line is 180 degrees. So given 140 degrees we know that g= 40.

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3 years ago

Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use a 0.1 margin of error, use a

Brums [2.3K]

Answer:

The minimum sample size is $n =135$

Step-by-step explanation:

From the question we are told that

The confidence interval is $( lower \ limit = \ 0.44,\ \ \ upper \ limit = \ 0.51)$

The margin of error is $E = 0.1$

Generally the sample proportion can be mathematically evaluated as

$\r p = \frac{ upper \ limit + lower \ limit }{2}$

$\r p = \frac{ 0.51 + 0.44}{2}$

$\r p = 0.475$

Given that the confidence level is 98% then the level of significance can be mathematically evaluated as

$\alpha = 100 - 98$

$\alpha = 2\%$

$\alpha =0.02$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table

The value is

$Z_{\frac{\alpha }{2} } = 2.33$

Generally the minimum sample size is evaluated as

$n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )$

$n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )$

$n =135$

6 0

3 years ago

A hat contains pieces of paper marked with the numbers 1 through 16. Tell whether picking an even number is impossible, unlikely

Anna [14]

Answer:

Picking an even number is an as likely event and it's probability is 1/2

Step-by-step explanation:

We know that the numbers present are 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16

The odd numbers are 1,3,5,7,9,11,13,15

The even numbers are 2,4,6,8,10,12,14,16

There are 8 even numbers and 8 odd numbers.

And also if we pick a number it should be either an even number or an odd number.

Probability(Getting an even number) = $\frac{even number}{even number+oddnumber}$

Probability = $\frac{8}{8+8}$ = 1/2

Therefore picking an even number is an as likely event and it's probability is 1/2

6 0

2 years ago

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goblinko [34]

Speed=Distance/Time
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3 years ago

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7 0

3 years ago