3 years ago

Plz helpppp will mark brainliesttttt

Mathematics

1 answer:

marishachu [46]3 years ago

5 0

Answer:

Step-by-step explanation:

P=2(L+W), we are given a side of 20 and a side of b

P=2(20+b)

P=40+2b

A) P(6)=40+12=52ft TRUE

B) P(8)=40+16=56ft TRUE

C) P(10)=40+20=60ft FALSE

D) P(12)=40+24=64ft FALSE

E) P(11)=40+22=62ft FALSE

So only A and B are true

You might be interested in

You and your friends have decided to camp for a night. Your friend claims the perimeter of his tent is 7.5 metres.

Georgia [21]

Perimeter =8.2
the friend is incorrect

4 0

3 years ago

I need help with this

Maksim231197 [3]

Answer: 4.75

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

An element with mass 970 grams decays by 27.7% per minute. How much of the element is remaining after 13 minutes, to the nearest

Mnenie [13.5K]

Basically, 27.7% of 970 is 268.69 grams, if 13 minutes so i’m pretty sure it’s 268.69 X 13 = 3492.97, it cannot be deduced from 970 unless it became −2522.97, is that the answer ur looking for?

6 0

3 years ago

An oil tank has to be drained for maintenance. The tank is shaped like a cylinder that is 4 ft long with a diameter of 2.2 ft. S

gavmur [86]

Answer:

$8\:\mathrm{minutes}$

Step-by-step explanation:

The volume of a cylinder is given as:

$r^2\cdot\pi\cdot h$

Since the diameter is $2.2$ , the radius is $\frac{2.2}{2}=1.1$ .

Therefore, the volume of this cylinder is:

$1.1^2\cdot 3.14\cdot 4=15.1976\:\mathrm{ft^3}$ , using $\pi=3.14$ as requested in the problem.

Since the tank is emptied at a constant rate of $1.5\:\mathrm{ft^3\:per\:minute}$ , it will take

$\frac{15.1976}{1.5}=7.5988=\fbox{$8\:\mathrm{minutes}$}$ to empty the tank.

8 0

3 years ago

The price of one share of stock in BadInvestment.com plunged 14 points in 4 weeks. Find the average change in the stock price pe

kiruha [24]

4 weeks at 7 days per week = (4 x 7) = 28 days

28/-14 = - 2....so the average change is -2 per day

3 0

3 years ago