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3 years ago

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A scientist planted seeds in 4 sections of soil for an experiment. not all of the seeds grew into plants. after 20 days, the sci

entist counted the number of plants in each of the 4 sections.

1 answer:

a_sh-v [17]3 years ago

4 0

I think you would multiply 20 × 4 and the answer would be 80 that the scientist counted the number of plants in each 4 sections after 20 days.

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In a class there are 30 boys and 10 girls. The ratio of boys to girls is

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The ratio of boys to girls would be 3:1
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3 years ago

Rob is saving to buy a new MP3 player. For every $13 he earns babysitting, he saves $9. On Saturday, Rob earned $78 babysitting.

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Answer:

54$

Step-by-step explanation:

We know that for each 13$ Rob earns babysitting, he saves 9$. Thus, we can separate the money he earns into groups of 13, and for each group of 13, we can add 9$ to his savings.

Assume that Rob has 78$ lying on a table. He grabs 13 of them, leaving 65, and puts 9$ to the side for savings. He does this 5 more times (as 65 divided by 13 is 5, so Rob would make 5 groups of 13 out of his 65$ that is left), meaning that he now has 5+1 (the original group) = 6 groups of 9. 9*6=54, so he saves 54$. Please let me know if you have any further questions!

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3 years ago

The opposite of -4 is ?

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Rebecca was advised to invest her £12000 life savings in a special High

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#a

#1st year

$\\ \rm\Rrightarrow 12000+0.045(12000)=12540$

#2nd year

$\\ \rm\Rrightarrow 12540+0.05(12540)=13167$

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#4th year

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#b

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Percentage

$\\ \rm\Rrightarrow \dfrac{2544.2}{12000}\times 100$

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