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OLEGan [10]
2 years ago
7

Help!!! Will give brainiest!!

Mathematics
2 answers:
jeka57 [31]2 years ago
7 0

Answer:

1. c

2.a

3.d

4.b

Step-by-step explanation:

1.£7.50/3

2.£3.75/5

3.£6.00/4

4.£13:50/6

<u><em>Let me know if this helps xx</em></u>

<u><em></em></u>

LUCKY_DIMON [66]2 years ago
5 0

Answer:

a: $3.75

b: $13.50

c: $7.50

d: $6.00

Step-by-step explanation:

hope this helps!

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When doctors prescribe medicine, they must consider how the drug’s effectiveness declines as time passes. If each hour a drug is
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Answer:

<u>The total time for the initial dose of 500 mg to reach a level of 150 mg is approximately 11 hours and 27 minutes </u>

Step-by-step explanation:

Initial dose = 500 mg

Let's calculate the effectiveness of the drug hour by hour, this way:

After 1 hour: 90% of 500 = 450 mg

After 2 hours: 90% of 450 = 405 mg

After 3 hours: 90% of 405 = 364.5 mg

After 4 hours: 90% of 364.5 = 328.05 mg

After 5 hours: 90% of 328.05 = 295.25 mg

After 6 hours: 90% of 295.25 = 265.73 mg

After 7 hours: 90% of 265.73 = 239.16 mg

After 8 hours: 90% of 239.16 = 215.24 mg

After 9 hours: 90% of 215.24 = 193.72 mg

After 10 hours: 90% of 193.72 = 174.35 mg

After 11 hours: 90% of 174.35 = 156.92 mg

After 12 hours: 90% of 156.92 = 141.23 mg

Difference between 11 and 12 hours: 156.92 - 141.23 = 15.7 mg

Difference per minute between 11 and 12 hours: 15.7/60 = 0.262 mg

Time to reach a level of 150 mg in minutes after 11 hours = (156.92-150)/0.262

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3 years ago
A circle has a circumference of 16 pi inches. What is the radius of the circle?
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