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saveliy_v [14]
3 years ago
10

Someone please help with this geometry question!!!

Mathematics
1 answer:
ahrayia [7]3 years ago
6 0

What is the number down their?

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A certain substance doubles its volume every minute at 9 AM a small amount is placed in a container ,at 10 AM the container was
Y_Kistochka [10]

Answer:

the container is 1/4 full at 9:58 AM

Step-by-step explanation:

since the volume doubles every minute , the formula for calculating the volume V at any time t is

V(t)=V₀*2^-t , where t is in minutes back from 10 AM and V₀= container volume

thus for t=1 min (9:59 AM) the volume is V₁=V₀/2 (half of the initial one) , for t=2 (9:58 AM) is V₂=V₁/2=V₀/4  ...

therefore when the container is 1/4 full the volume is V=V₀/4 , thus replacing in the equation we obtain

V=V₀*2^-t

V₀/4 = V₀*2^-t

1/4 = 2^-t

appling logarithms

ln (1/4) = -t* ln 2

t = - ln (1/4)/ln 2 = ln 4 /ln 2 = 2*ln 2 / ln 2 = 2

thus t=2 min before 10 AM → 9:58 AM

therefore the container is 1/4 full at 9:58 AM

8 0
2 years ago
Simplify the expression by combining like terms.
olasank [31]

Here's the answer:

-1/4d+f

7 0
2 years ago
Umm plz help with just the first part
harkovskaia [24]

Answer:

Factored form: -2(x + 7) = 8, x = -11 (brainliest)?

Step-by-step explanation:

-2(x + 7) = 8

x + 7 = 8 / -2

x + 7 = -4

x = -4 - 7

= -11

6 0
3 years ago
HELP PLZZ BTW I NEED THE WORK so plz include it if you do I will mark you brainliest
Sergeu [11.5K]

Answer:

C

C

C

I hope this help

5 0
2 years ago
Read 2 more answers
Cameron brought a set of 7 classic paperbacks to a secondhand store to sell. He was paid cash for the entire set. Before he left
BigorU [14]

Answer:

6.44

Step-by-step explanation:

subtract 6.50 by 4 which will give you 6.44

4 0
2 years ago
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