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bija089 [108]
3 years ago
15

7th grade help me please :))

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
7 0

Answer:

-1/2 is the work

Step-by-step explanation:

hope this helped

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A bus travels at a speed of 80km per hour . what is the distance it travels by 15 mins.
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Answer:

The bus will travel 20km within 15 minutes

Step-by-step explanation:

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A 30 gram sample of a substance that's used to sterilize surgical instruments has a k-value of 0.1235. Find the substances half
jok3333 [9.3K]

Answer : The substances half life in days is, 5.6 days.

Step-by-step explanation :

Half life : It is defined as the amount of time taken by a radioactive material to decay to half of its original value.

All radioactive decays follow first order kinetics.

The relation between the half-life and rate constant is:

k=\frac{0.693}{t_{1/2}}

where,

k = rate constant = 0.1235 per days

t_{1/2} = half-life

Now put all the given values in the above formula, we get:

0.1235\text {days}^{-1}=\frac{0.693}{t_{1/2}}

t_{1/2}=5.6\text{ days}

Thus, the substances half life in days is, 5.6 days.

5 0
3 years ago
Whats 3480+ 92719384
nikitadnepr [17]
92722864

Hope this helps ya
3 0
3 years ago
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A paint can has a radius of 4 inches and a height of 15 inches. What is the volume of the paint can?
xxMikexx [17]

For this case we have that by definition, the volume of a cylinder is given by:

V = \pi * r ^ 2 * h

Where:

A: It's the radio

h: It's the height

We have according to the data:

r = 4 \ in\\h = 15 \ in

Substituting:

V = \pi * (4) ^ 2 * 15\\V = \pi * 16 * 15\\V = \pi * 240\\V = 753.6 \ in

Thus, the volume of the paint can is 753.6 cubic inches.

Answer:

V = 753.6 \ in^3

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3 years ago
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You are recently promoted as the chief traffic management officer of a major city in the country. Based on recent data, you lear
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Step-by-step explanation:

<h2>3(100)2 + 17(100) - 20</h2>

3(10000) + 1700 - 20

30000 + 1700 - 20

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