3 years ago

What is the value of x in the equation 3/2(4−2)−3=5−(+2

Mathematics

1 answer:

vazorg [7]3 years ago

3 0

Answer:

Step-by-step explanation:

34-34

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Find the circumference and the area of a circle with diameter 8.

satela [25.4K]

Answer:

Area = 50.24 units²

Circumference = 25.12 units

Step-by-step explanation:

Circumference $= 2\pi r$

$=\pi d$

$=3.14\times 8$

$=25.12$

Area $= \pi r^2$

$r = 8\div2$

$=4$

Area $= 3.14\times4^2$

$=50.24$

∴ The circumference of the circle is 25.12 units, and the area of the circle is 50.24 units²

Hope this helps :)

7 0

3 years ago

If the simple interest on $7,000 for 9 years is 3,780, then what is the interest rate?

Andreas93 [3]

Answer:

Step-by-step explanation:

Interest = Principal × Rate × Time/100

$3780 = $7000(9)(rate)/100

63000rate = 378000

rate= 378000/63000

rate = 6% per annum (Answer)

8 0

3 years ago

The concentration, in parts per million, of a type of antibiotic in a human's bloodstream after h hours can be modeled by the po

saveliy_v [14]

Answer:

$C(3)=17.69\ ppm$

Step-by-step explanation:

Given:

Given polynomial function is.

$C(h)=-0.09h^{2} +3.5h+8$

Hours $h=3$

We need to find the concentration of the antibiotic after 3 hours.

Solution:

Rewrite the given polynomial function as.

$C(h)=-0.09h^{2} +3.5h+8$

Substitute $h=3$ in given polynomial function.

$C(3)=-0.09(3)^{2} +3.5\times 3+8$

$C(3)=-0.09\times 9+10.5+8$

$C(3)=-0.81+10.5+8$

$C(3)=-0.81+18.5$

$C(3)=17.69\ ppm$

Therefore, the concentration of the antibiotic after 3 hours $C(3)=17.69\ ppm$ .

8 0

4 years ago