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Damm [24]
2 years ago
13

How do I multiply a decimal with another decimal?

Mathematics
2 answers:
Lapatulllka [165]2 years ago
6 0
If you have no calculator, pretend like the decimals aren’t there then add them back depending on how many places you have after the decimal. for example: 2.5 times 2.5, if you pretend there are no decimals, you get 625, then you have to add the decimals back. since you have 1 digit after each decimal in each number, you add 1+1=2 to get the number of places you have to add back. so you get 6.25
Black_prince [1.1K]2 years ago
6 0

Answer:

You can use multiplication normally. But then you must add the decimals

Step-by-step explanation:

Lets do 24.56 x 32.78

It would equal 8050768 without decimal points

But now we must add the decimal points in, count the amount of numbers that appear after the decimal, which is 4

So 8050768 = 805.0768

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Factor 25x2 - 45x - 10
AysviL [449]

Answer: 5 (8-9x)

Step-by-step explanation:

25 x 2 - 45 x -10

50 - 45 x -10

40 - 45x

8 0
3 years ago
The radius of this ball is 15 inches. Which equation gives the ball's surface area, in square inches?
victus00 [196]

Answer:

\large\boxed{S.A.=4500\pi\ in^2\approx14130\ in^2}

Step-by-step explanation:

The formula of a surface area of a ball (sphere):

S.A.=\dfrac{4}{3}\pi R^3

R - radius

We have R = 15in. Substitute:

S.A.=\dfrac{4}{3}\pi(15^3)=\dfrac{4}{3}\pi(3375)=4500\pi\ in^2

If you want to get an approximation, then:

\pi\approx3.14\\\\S.A.\approx(4500)(3.14)=14130\ in^2

5 0
3 years ago
An arc of length 30 meters is formed by a central angle A on a circle of radius 15. The measure of A in degrees (to two decimal
Iteru [2.4K]
An arc of length 30 m : l = 30 m.
r = 15 m,  ∠ A = ?
Formula for the length of an arc is:
 l = r π A / 180°  ( where A is the central angle )
A = l · 180 / r π = ( 30 · 180 ) / ( 15 · 3.1415926 ) = 114.43 °
This is very close to your result. 
3 0
3 years ago
Read 2 more answers
Write both equations of the following system in the slope intercept form in order to decide how many solutions the system will h
anastassius [24]
Hi :) You don't need to get their slope-intercept form to know how many solutions this linear system has. Since there are two variable and 2 independent equations, there would be two solutions. One value each for the x and y variables. 

The answer is B.
5 0
3 years ago
Six men and seven women apply for two identical jobs. If the jobs are filled at random, find the probabilities that both are fil
aivan3 [116]

Answer:

1/6 for the old man. 1/7 for the old lady.

2/13 that they are twins.

6 0
3 years ago
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