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4 years ago

Please answer Question 20

Mathematics

1 answer:

Sladkaya [172]4 years ago

8 0

Answer:

Perimeter = 20m

Area = 25m

If you want a good explanation please comment on this, I am at middle school and I have to go.

Step-by-step explanation:

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How is percentages and conversions used in the healthcare field

DanielleElmas [232]

Sometime you have to convert medicine amounts or maybe how much you have to cut something in surgery that you have to convert you also might use percentages figuring out the percent of something to go in a specific medication

4 0

3 years ago

A cereal company is putting 1 of 4 prizes in each box of cereal. The prizes are evenly distributed so the probability of winning

Nezavi [6.7K]

Answer: 0.3

Step-by-step explanation:

Because it took fewer than 7 boxes only 6 of the 20 simulated trials

P(fewer than 7 boxes) = 6/20 = 3/10 = 0.3

6 0

3 years ago

Read 2 more answers

What is the difference when 2x - 5 is subtracted from x + 4

coldgirl [10]

Answer;

-x-1

Step-by-step explanation:

x +4

-2x-5

= -x -1

am not sure check if my answer is correct

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3 years ago

Item5 Time Remaining 56 minutes 30 seconds00:56:30 Item 5Item 5 Time Remaining 56 minutes 30 seconds00:56:30 A pure sample of tr

trapecia [35]

Answer:

option A

Step-by-step explanation:

given,

sample of tritium, ³H

$t_{1/2} = 12.32 years$

contents present of ³H = 5.25 mol

content of ³He = 6.35 mol

reaction

$^3H\rightarrow \ ^3He$

A₀ is the initial concentration

At is the concentration after time t

A₀ = 5.25 + 6.35 = 11.6 mol

At = 5.25

now,

$k = \dfrac{0.693}{t_{1/2}}$

$k = \dfrac{0.693}{12.32}$

k = 0.0563 /year

$ln(\dfrac{A_o}{A_t}) = k t$

$t = \dfrac{1}{k} ln(\dfrac{A_o}{A_t})$

$t = \dfrac{1}{0.0563} ln(\dfrac{11.6}{5.25})$

t = 14.1 yr

hence, the correct answer is option A

7 0

3 years ago

Construct 3 linear equation starting with qiven solution z = 1/3

Andreyy89

Answer:

(a) $9z+2=5$

(b) $21z-11=-4$

Step-by-step explanation:

We are required to construct 3 linear equations starting with the given solution z = 1/3.

Equation 1

$z=\frac{1}{3}$

Multiply both sides by 9

$9z=\frac{1}{3}\times 9\\9z=3$

Rewrite 3 as 5-2

9z=5-2

Add 2 to both sides

Our first equation is: $9z+2=5$

Equation 2

$z=\frac{1}{3}$

Multiply both sides by 21

$21z=\frac{1}{3}\times 21\\21z=7$

Rewrite 7 as 11-4

21z=11-4

Subtract 11 from both sides

Our second equation is: $21z-11=-4$

Equation 3

$z=\frac{1}{3}$

Multiply both sides by 6

$6z=\frac{1}{3}\times 6\\6z=2$

Rewrite 6z as 4z+2z

4z+2z=2

Subtract 2z from both sides

Our third equation is: $4z=2-2z$

4 0

3 years ago