1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Juliette [100K]
3 years ago
12

Don’t understand this question

Mathematics
1 answer:
spayn [35]3 years ago
5 0
It's easy you just need to multiply both numbers by 25
You might be interested in
I'll give u full brainlist if u do this!
alex41 [277]

Answer:

a. 54.75

b. 2.64

Step-by-step explanation:

6 0
3 years ago
An item is regularly priced at $90 . leila bought it at a discount of 60% off the regular price. how much did leila pay?
forsale [732]
90(.4) = 36

Leila payed $36
3 0
3 years ago
A circular swimming pool has a diameter of 40 meters. The depth of the pool is constant along west-east lines and increases line
Nataliya [291]

Answer:

Volume is 2000\pi\ m^{3}

Solution:

As per the question:

Diameter, d = 40 m

Radius, r = 20 m

Now,

From north to south, we consider this vertical distance as 'y' and height, h varies linearly as a function of y:

iff

h(y) = cy + d

Then

when y = 1 m

h(- 20) = 1 m

1 = c.(- 20) + d = - 20c + d              (1)

when y = 9 m

h(20) = 9 m

9 = c.20 + d = 20c + d                  (2)

Adding eqn (1) and (2)

d = 5 m

Using d = 5 in eqn (2), we get:

c = \frac{1}{5}

Therefore,

h(y) = \frac{1}{5}y + 5

Now, the Volume of the pool is given by:

V = \int h(y)dA

where

A = r\theta

A = rdr\ d\theta

Thus

V = \int (\frac{1}{5}y + 5)dA

V = \int_{0}^{2\pi}\int_{0}^{20} (\frac{1}{5}rsin\theta + 5) rdr\ d\theta

V = \int_{0}^{2\pi}\int_{0}^{20} (\frac{1}{5}r^{2}sin\theta + 5r}) dr\ d\theta

V = \int_{0}^{2\pi} (\frac{1}{15}20^{3}sin\theta + 1000) d\theta

V = [- 533.33cos\theta + 1000\theta]_{0}^{2\pi}

V = 0 + 2\pi \times 1000 = 2000\pi\ m^{3}

7 0
3 years ago
Hezekiel runs 1000 m at a rateof 3 minutes per km. how long does he take to run 500 m​
lana66690 [7]

Step-by-step explanation:

1 km = 1000 m

(hence the term "kilo" which means 1000).

so. he runs 1000 m at the rate of 3 minutes per km, that means 3 minutes per 1000 m.

now, we can see the solution already with our eyes.

but let's do it formally :

the rate or ratio between time and distance must be the same for the same speed.

so,

3 min / 1000 m = x min / 500 m

500 m × 3 min / 1000 m = x min

1/2 × 3 min = x min

3/2 = 1.5 min = x min

so, it takes him 1.5 minutes (90 seconds) to run 500 m.

3 0
2 years ago
What is the answer for this question <br> 20 x 70
Mice21 [21]

Answer:

1400

Step-by-step explanation:

Because

7 x 2 = 14

Then add on the two zeroes at the end

1400

6 0
3 years ago
Other questions:
  • Trey reads 10 pages in 25 minutes. At the rate, how many pages will he read in 45 minutes?
    11·1 answer
  • The measure of an angle is 15 degrees what is the measure of its supplementary angle?
    6·2 answers
  • The least common multiple of 20, 24, and 45 is _____.<br> A. 30<br> B. 180<br> C. 360<br> D. 21,600
    13·1 answer
  • What number should be added to –2 to get a sum of 2?
    7·1 answer
  • How to set up 701 km -523 km 445 m
    15·1 answer
  • What is 9k-2&lt;3k+10 these type of problems are confusing
    5·2 answers
  • Will give brainliest plz hep!!!!!
    5·1 answer
  • Calculate the value for each determinant:
    8·1 answer
  • Which of the following pairs of ratios are equivalent?
    12·1 answer
  • Identify all the word phrases that can be represented using the expression 3t – 5.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!