A large jar contains 1380 coins. The result of 40 coins pulled at random from the jar is given below.

Mathematics

2 answers:

vredina [299]3 years ago

8 0

Answer:IS B OR D BUT I SAY D

Step-by-step explanation:

Ludmilka [50]3 years ago

7 0

Answer:

Step-by-step explanation:

there are 10 dimes. that is 1/4 of the all the coins. So we can do 1380/4=345. Since 1380 is including the 10 dimes, 345*10=3450. Then we add the decimal point at 34.50 as this is USD and 100 cents in a dollar

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Kathleen makes bracelets to sell in a booth at a local store. She spent $62.30 on supplies to make bracelets for the next month.

vodomira [7]

Answer:

$105.20

Step-by-step explanation:

Given that :

Cost of materials = $62.30

Cost of booth = $25 / month

Price per bracelet = $5.50

Profit of 35 bracelet is sold next month =?

Profit = Revenue - Expenses

Revenue = $5.50 * 35 = $192.50

Expenses = $25 + $62.30 = $87.30

Profit = $192.50 - $87.30

= $105.20

4 0

2 years ago

PLease help me ,really need help with explanation

mylen [45]

Check the picture below.

volume wise, we know the smaller pyramid is 1/8 th of the whole pyramid, so the volume of the whole pyramid must be 8/8 th.

Now, if we take off 1/8 th of the volume of whole pyramid, what the whole pyramid is left with is 7/8 th of its total volume, and that 7/8 th is the truncated part, because the 1/8 we chopped off from it, is the volume of the tiny pyramid atop.

Now, what's the ratio of the tiny pyramid to the truncated bottom?

$\stackrel{\textit{\Large Volumes}}{\cfrac{\textit{small pyramid}}{\textit{frustum}}\implies \cfrac{~~\frac{1}{8}whole ~~}{\frac{7}{8}whole}}\implies \cfrac{~~\frac{1}{8} ~~}{\frac{7}{8}}\implies \cfrac{1}{8}\cdot \cfrac{8}{7}\implies \cfrac{1}{7}$