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4 years ago

Please I need some help

Mathematics

1 answer:

gulaghasi [49]4 years ago

5 0

Id day B. 2.2 kilometers, but its just an estimate

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Can you find the values of A and B please.

Tom [10]

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3 years ago

The concentration C (in mg/dl), of an antibiotic in a patient’s bloodstream per hour, t, is given by: c(t) = (50t)/(t^2+25) In o

NARA [144]

Answer:

Step-by-step explanation:

<u>Functions </u>

The problem describes a function that expresses the concentration of an antibiotic in mg/dl vs time in hours as:

$\displaystyle c(t)=\frac{50\ t}{t^2+25}$

We need to find the first value of t such that

$\displaystyle c(t)\geq 4$

It means that

$\displaystyle \frac{50\ t}{t^2+25}\geq 4$

Operating with the inequality

$\displaystyle 50\ t\geq 4\ t^2+100$

Rearranging and dividing by 2, we have a polynomial inequality:

$\displaystyle 2t^2-25t+50\leq 0$

Factoring

$\displaystyle 2(t-10)\left (t-\frac{5}{2}\right )\leq 0$

There are two possible values for t, both valids because they are positive

$\displaystyle t=\frac{5}{2}=2.5, \ t=10$

We need to find the first value, i.e.

$t=2.5 \ hours$

Now for the graphic method, we plot the graph for the function and a horizontal line at c=4 to find the values of t.

The graph is shown in the image provided below. We can see both values where the funcion and C=4 intersect. Both values coincide with the previously analitically found values

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3 years ago

I Calculate each value of angle A to the nearest degree.

Masteriza [31]

Answer: I think the answer is 127 if it is wrong i am so sorry

Don't forget drop a heart.

Step-by-step explanation:

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3 years ago

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Can you please tel, me what is step 3

stepladder [879]

Answer below hope it helped

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3 years ago

Solve please -3x-27=

juin [17]

Answer:

−3(x+9)

Step-by-step explanation:

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3 years ago

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