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tatiyna
3 years ago
8

Match each percent amount to its correct value. Tiles 15% of 30 30% of 45 60% of 7 23% of 20

Mathematics
2 answers:
Naddik [55]3 years ago
8 0
15% of 30 = 4.5
30% of 45= 13.5
60% of 7= 4.2
23% of 20= 4.6
Vlad [161]3 years ago
4 0

Answer:

15% of 30 = 4.5

30% of 45= 13.5

60% of 7= 4.2

23% of 20= 4.6

Step-by-step explanation:

We multiply each percent amount. To remove % we divide by 100

15% of 30

15/100 * 30 = 0.15 * 30=4.5

30% of 45

30/100 * 45 = 0.30 * 45=13.5

60% of 7

60/100 * 7 = 0.6 * 7=4.2

23% of 20

23/100 * 20 = 0.23 * 20=4.6

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Heather drove 265 miles using 10 gallons of gas. At this rate, how many gallons of gas would she need to drive 424 miles?
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The mass of a bacteria culture doubles every four days. If the initial sample is 5mg: a) how much will you have after one week (
maks197457 [2]

Answer:

a) 16.82 mg

b) 24 days

Step-by-step explanation:

Formula for exponential growth is given as:

A=A_0b^{\frac{t}{c}}

Where A is the final population

A_0 is the initial population

b is the growth factor

c is the time taken for the growth 'b'

t is the amount of time

Here, We are given the following:

A_0 = 5 mg

b = 2 (Given because it doubles)

c = 4 days

a) A = ?

Using the formula:

A=5 \times 2^{\frac{7}{4}}\\\Rightarrow A=5 \times 2^{1.75} \\\Rightarrow A = \bold{16.82\ mg}

b) Given

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t = ?

Using the above formula again:

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b) 24 days

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Answer:

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