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Luba_88 [7]
3 years ago
15

a culture started with 1000 bacteria. after 2 hours it grew to 1200 bacteria. predict how many bacteria will be present after 13

hours. round your answer to the neares whole number
Mathematics
1 answer:
lesya692 [45]3 years ago
6 0
The answer is 2300 because the climbing rate is 100 bacteria per hour. so times 100 and 13 and u get 1300 and u have to add that to the a 1000

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saw5 [17]
Your answers all seem correct.
3 0
3 years ago
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Solves 2/7(4q+7/2)-3q=9
avanturin [10]
So we multiply both sides by 7 to make 2/7 a whole number. You get 2(4q+7/2)-21q=63. Then take 4q+7/2 out of parentheses and you get 8q+7-21q=63. Subtract 7 on both sides and add the q’s together, -13q=56. Divide both sides by -13 and you get around 4.3
7 0
3 years ago
What is the volume of the cylinder shown? (Use 3.14 for π .) the height is 21 in and half the diameter is 15 .
-BARSIC- [3]

Answer:

Volume = 14,836.5 cubic inches

Step-by-step explanation:

Cylinder not shown but information given. So we will calculate the volume.

Volume of Cylinder is given by the formula:

V=\pi r^2 h

Where

V is the volume

r is the radius (HALF of DIAMETER)

h is the height

It is given in the problem,

Height is 21

h = 21

and

half the diamter (aka radius) is 15

r = 15

Substituting into formula and using 3.14 for \pi, we get the volume:

V=\pi r^2 h\\V=\pi (15)^2 (21)\\V=(3.14)(225)(21)\\V=14,836.5

Hence, the volume is:

Volume = 14,836.5 cubic inches

7 0
4 years ago
Jessica spends $200 at a thrift shop.she spends $64 on rings and the rest on 4 equally priced bracelets which equation represent
Over [174]

Answer: The answer is B. Have a nice day.

Step-by-step explanation: Plz make brainliest. (I only need 1 more to become an expert!)

6 0
3 years ago
What are the coordinates of the vertex for f(x) = 3x2 + 6x + 3? (−1, 0) (3, 6) (0, −1) (6, 3)
larisa [96]

Answer:

The vertex is the point (-1,0)

Step-by-step explanation:

we have

f(x)=3x^{2} +6x+3

we know ow that

The equation of a vertical parabola into vertex form is equal to

y=a(x-h)^{2}+k

where

(h,k) is the vertex of the parabola

Convert the equation into vertex form

Group terms that contain the same variable, and move the constant to the opposite side of the equation

f(x)-3=3x^{2} +6x

Factor the leading coefficient

f(x)-3=3(x^{2} +2x)

Complete the square. Remember to balance the equation by adding the same constants to each side

f(x)-3+3=3(x^{2} +2x+1)

f(x)=3(x^{2} +2x+1)

Rewrite as perfect squares

f(x)=3(x+1)^{2}

therefore

the vertex is the point (-1,0)

6 0
3 years ago
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