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3 years ago

DO NOT SKIP!! Let’s see who’s smart enough to work out this problem if u get it correct I’ll mark u as BRAINLIEST

Mathematics

1 answer:

sammy [17]3 years ago

8 0

Answer:

Answer: 13.2J

Step-by-step explanation:

- m= 3kg, h= .45m, g=9.8 m/s

find formula for determining potential energy:

- P=mgh

plug numbers into equations, replacing variables:

- (3kg)(9.8)(.45)

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3.00/hour=___cents/minute (15 points)

dedylja [7]

Hello,

The answer is "180 mins".

Reason:

60+60+60=180

60×3=180mins or 5 cents

If you need anymore help feel free to ask me!

Hope this helps!

~Nonportrit

8 0

3 years ago

Read 2 more answers

Order the Numbers from least to greatest<br> 8.1 x 10-5<br> 6.5 x 10-4<br> 5.2 x 10-3

loris [4]

Hi I don’t understand what you mean by the 10-5 and those others but if u mean order the numbers 8.1,6.5,5.2 from least to greatest then I can do that it’s 5.2, 6.5, 8.1 hope that helped

8 0

3 years ago

A contaminant is leaking into a lake at a rate of R(t) = 1700e^0.06t gal/h. Enzymes that neutralize the contaminant have been ad

olasank [31]

Answer:

16,460 gallons

Step-by-step explanation:

This is a differential equation problem, we have a constant flow of contaminant into the lake, but also we know that only a fraction of that quantity of contaminant remains because of the enzymes. For that reason, the differential equation of contaminant's flow into the lake would be:

$\frac{dQ}{dt} =1700exp(0.06t)*exp(-0.32t)\\\frac{dQ}{dt} =1700exp(-0.26t)\\$

Then, we have to integrate in order to find the equation for Q(t), as the quantity of contaminant in the lake, in function of time.

$\int\limits^0_t {dQ}=\int\limits^0_t {1700exp(-0.26t)dt}\\Q(t)=\frac{1700}{-0.26} exp(-0.26t)+C \\$

Now, we use the given conditions to replace them in the equation, in order to solve for $C$

$t_{0} =0\\Q_{0}=10,000\\Q_{0}=-6538exp(-0.26*0)+C\\C=10,000+6538=16538$

Then, we reorganize the equation and we replace t for 17 hours, in order to determine the quantity of contaminant at that time:

$Q_{t} =-6538exp(-0.26t)+16538\\Q_{17} =-6538exp(-0.26*17)+16538\\Q_{17} =16460 gallons$

3 0

3 years ago

Why is the sum of -5 and +5 equal to zero?

Komok [63]

Answer:

- and + cancel each other

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Please help, see pic attachment

S_A_V [24]

Answer:

the answer is 30

Step-by-step explanation:

because it is an equilateral triangle all sides are the same so if you set 3x+15 equal to 7x-5 and solve for x you get 4x=20 and x= 5

when you plug 5 in to each equation you get 30 for both sides and so it proves that the answer is 30

6 0

3 years ago