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3 years ago

A student completes about 8 problems every 3 minutes. At this rate, how long will it take the student to complete 20 problems?

Mathematics

1 answer:

storchak [24]3 years ago

5 0

Answer:

Step-by-step explanation:

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if the diameter of a cone is 16cm and the height is 15cm what is the volume? I've tried the formula v=1/3*3.14*r^2*h but the ans

Alisiya [41]

Answer:

V= volume of cone A=Ah A= πr2

A= area of base 3

H= height

V= (3.1416)(16)(15) 3.1416x16x15= 753.9

V= 753.9 753.9÷3= 251.3 cu. in

Volume of the cone is 251.3 cu. in

I hope this helps you. Good luck!

5 0

2 years ago

Write the equation of a circle whose center is at (-1,5) and radius is 8

labwork [276]

Answer:

X²+y²+2x-10y+18=0 is the equation of circle

Step-by-step explanation:

Eqn of circle is: (x-h) ²+(y-k)²=r²

At (h, k) =(-1,5) and r=8 where h, k are center and r is radius.

Eqn is :(x+1)²+(y-5)²=8²

Or, x²+2x+1+y²-10y+25=8

Or, x²+y²+2x-10y+18=0 is the equation of circle

6 0

2 years ago

I’ll give brainliest if u answer within 30 mins

Alecsey [184]

Answer:

96.7 maybe or 6.75 or 5.67 or even 56.77

Step-by-step explanation:

6 0

2 years ago

At the moment a certain medicine is injected, its concentration in the bloodstream is 120 milligrams per liter.

igomit [66]

Answer:

$c(t) = 120 [0.7]^{t}$

Step-by-step explanation:

At the moment a certain medicine is injected, its concentration in the bloodstream is 120 milligrams per liter.

From that moment forward, the medicine's concentration drops by 30% each hour.

Therefore, the medicine concentration c(t) in mg/liters after t hours will be modeled as

$c(t) = c(0) [1 - \frac{30}{100}]^{t}$

⇒ $c(t) = c(0) [1 - 0.3]^{t}$

⇒ $c(t) = 120 [0.7]^{t}$ . (Answer)

7 0

3 years ago

Read 2 more answers

The function f(x)=x2+1x-3 written in vertex form

Alisiya [41]

Y=(x+1/2)^2-13/4 is the answer to this question.

8 0

4 years ago