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Andreas93 [3]
3 years ago
5

The school principal spent $2,000 to buy some new computer equipment.Of this money $120 was used to buy some new keyboards.What

percent of the money was spent on keyboard
Mathematics
1 answer:
Fittoniya [83]3 years ago
5 0

Answer:

6%

Step-by-step explanation:

120/2000= 60/1000= 6/100= 6%

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Keith_Richards [23]
32 because 32 x 100 = 3,200
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2 years ago
Complete the table for the radioactive iotope. (Round your anwer to 2 decimal place. Iotope : 239 Pu
Marizza181 [45]

If the radio active isotope has the half life of 24100 years, then the initial quantity is 2.16 grams

The half life in years = 24100

Consider the quantity of the radio active isotope remaining

y = Ce^{kt}

When t = 1000 the y = 1.2

y = C/2 when t = 1599

Substitute the values in the equation

C/2 = Ce^{24100k}

Cancel the C in both side

1/2 = e^{24100k}

Here we have to apply ln to eliminate the e terms

ln (1/2) = 24100k

k = ln(1/2) / 24100

k = -2.87× 10^-5

To find the initial value we have to substitute the value of k and y in the equation

1.2 = Ce^{1000 ×  -2.87× 10^-5}

C = 1.2 / e^(-0.0287)

C = 2.16 gram

Hence, the initial quantity of the radioactive isotope is 2.16 gram

Learn more about half life here

brainly.com/question/4318844

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7 0
1 year ago
At the neighborhood grocery, 4.5 pounds of chicken breast cost $53.28. Benjamin
otez555 [7]
If my math is correct this should be a simple equation. First you’d start off by figuring out how much money chicken costs per one pound.
53.28 / 4.5 = $11.84 per pound
Now take how much money the chicken costs per pound and divide it by how much Benjamin spent.
59.20 / 11.84 = 5 pounds
Your answer should be exactly 5 pounds
I apologize if this is incorrect math, but the equation seems simple at first glance.
6 0
3 years ago
You have 480 roses and 24 of them dies, how many per cent died?
Setler79 [48]

Answer:

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Step-by-step explanation:

5% of the roses died.

480 roses = Total number of roses

24 roses = number of roses that died

24 roses that died as a percent of 480 the total is:

24/480*100= 5%

To find the percent of roses that died, we take the number of roses that died and divide it by the total amount of roses there are and multiply it by 100 to find the percent.

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3 years ago
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adell [148]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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