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3 years ago

What is o.20 as a percent

Mathematics

2 answers:

Tanzania [10]3 years ago

3 0

Answer:

It simply 20% hope this helps :)

Step-by-step explanation:

Do you want me to tell u why its 20%

GrogVix [38]3 years ago

3 0

Answer:

20% because a percent will have zero's at the end and front.

If i say 2%, it will be 0.2

If i say 20%, it will equal 0.20.

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Sarah is fighting a sinus infection her doctor prescribed a nasal spray and I know a biotic to fight the infection the active in

KengaRu [80]

Answer:

a) The antibiotic is made with a greater initial amount of active ingredient

b) The two medications will have the same amount of active ingredients in the blood stream at exactly 8 hours after first taking the medication.

Step-by-step explanation

Active ingredient of Nasal spray left in the bloodstream is modelled as

n(t) = ((t + 1)/(t + 5)) + (18/(t² + 8t + 15))

Active ingredient of Antibiotic left in the bloodstream is modelled as

a(t) = 9/(t+3)

with t in hours.

a) At the instance of usage, the active ingredient for both drugs are at their initial concentration as they appear in the drugs.

So, we find the amount of active ingredient for each drug in the bloodstream at t=0 and compare.

For nasal spray,

n(t) = ((t + 1)/(t + 5)) + (18/(t² + 8t + 15))

At t = 0

n(0) = (1/5) + (18/15) = 1.4

For antibiotics,

a(t) = 9/(t+3)

At t=0

a(0) = (9/3) = 3

3 > 1.4

Hence, the antibiotic is made with a greater initial amount of active ingredient.

b) when both medications will have the same amount of active ingredients in the bloodstream, n(t) = a(t)

n(t) = ((t + 1)/(t + 5)) + (18/(t² + 8t + 15))

a(t) = 9/(t+3)

Note that (t² + 8t + 15) = (t + 3)(t + 5)

When n(t) = a(t)

((t + 1)/(t + 5)) + (18/(t² + 8t + 15)) = 9/(t+3)

Multiplying through by (t² + 8t + 15) or more properly written as (t + 3)(t + 5)

(t+1)(t+3) + 18 = 9(t+5)

t² + 4t + 3 + 18 = 9t + 45

t² - 5t - 24 = 0

Solving the quadratic equation

t = 8 or t = -3

Time can't be negative, hence, t = 8 hours.

Hope this Helps!!!

6 0

4 years ago

Two submarines, one cruising at 25 knots and the other at 20 knots, left a naval base at the same moment. Three hours later, the

sweet [91]

<h2>Measure of the angle between their courses is 95°</h2>

Step-by-step explanation:

Speed of submarine 1 = 25 knots = 28.77 mph

Speed of submarine 2 = 20 knots = 23 mph

Time taken = 3 hours

Distance traveled by submarine 1 = 28.77 x 3 = 86.31 miles

Distance traveled by submarine 2 = 23 x 3 = 69 miles

Distance between them is 100 nautical miles = 115.08 miles

Refer the figure

By cosine formula we have

$cosB=\frac{a^2+c^2-b^2}{2ac}$

a = 86.31 miles

b = 115.08 miles

c = 69 miles

Substituting

$cosB=\frac{86.31^2+69^2-115.08^2}{2\times 86.31\times 69}\\\\cosB=-0.0867\\\\B=94.98^0=95^0$

Measure of the angle between their courses is 95°

4 0

4 years ago

What is the period of the function f(x)=cos2x ?

Nostrana [21]

Answer:

Step-by-step explanation:

The argument of the cosine function will be 2π (one period) when x=π.

The period of the function is π.

3 0

3 years ago

MATH TEST PLEASE HELP ASAP

Lunna [17]

Answer:

1734

Step-by-step explanation:

3 times 17 to find the number of feet =51

51 time $34 (the price per foot ) to find total

8 0

3 years ago

What is 4 x 3 to the 2nd power

polet [3.4K]

4 x 3 = 12, and
12 to the power of 2 (12 x 12) is 144.

6 0

3 years ago