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Fiesta28 [93]
4 years ago
6

(2.0 x 10^-4)x (3.1 x 10^-20

Mathematics
1 answer:
pshichka [43]4 years ago
3 0
A sign has 64 rows<span> of </span>lights<span> with </span>128 lights<span> in </span>each row<span>. How </span>many lights<span> are on - 685853. ... on the </span>sign<span>? </span>Choose exactly two answers<span> that are </span>correct<span>. A. </span>multiplication B<span>. </span>division C<span>. </span>2 D<span>. </span>8,192<span>. 1 ... </span>128 light each<span>. (or </span>128 rows<span> with </span>64 light each<span>) so per </span>each row<span> there are </span>128<span> so </span>64<span>* </span>128<span>give the total </span>answer.<span>A </span>sign has 64 rows<span> of </span>lights<span> with </span>128 lights<span> in </span>each row<span>. How </span>many lights<span> are on - 685853. ... on the </span>sign<span>? </span>Choose exactly two answers<span> that are </span>correct<span>. A. </span>multiplication B<span>. </span>division C<span>. </span>2 D<span>. </span>8,192<span>. 1 ... </span>128 light each<span>. (or </span>128 rows<span> with </span>64 light each<span>) so per </span>each row<span> there are </span>128<span> so </span>64<span>* </span>128<span>give the total </span>answer<span>.</span>
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Practice multiplying numbers by powers of 10.
Juliette [100K]
Answer:

Multiply (400 + 20 + 3) x 10000

Add 4 zeros to the end of 423

Step-by-step explanation:

423 x 10,000 = Adding the amount of zero’s in 10000 to 423



8 0
3 years ago
What is the volume of a square pyramids
frozen [14]

Answer:

\large\boxed{V=75\ in^3}

Step-by-step explanation:

The formula ogf a volume of  a pyramid:

V=\dfrac{1}{3}BH

B - area of a base

H - height

We have a base length a = 5 in and a height H = 9 in.

In the base we have a square. The formula of an area of a square is:

B=a^2

Substitute:

B=5^2=25\ in^2

Calculate the volume:

V=\dfrac{1}{3}(25)(9)=(25)(3)=75\ in^3

7 0
3 years ago
What solid 3D object is produced by rotating the triangle about line m?
elena55 [62]

Answer: A cone with height 3 and radius 1

Step-by-step explanation:

Hi, searching I found the image for the question, attached down below.

By rotating the triangle about line m, a cone with height 3 and radius 1 is produced.

Solid 3d objects are produced by rotating a 2d figure around a straight line that lies in the same place.

in our case, if we rotate the triangle around the line, the vertices in touch with the line m remains stationary, while the  remaining vertex follows the path of a circle, creating a cone.

6 0
3 years ago
Read 2 more answers
Factorise each of the following algebraic expressions completely,
LekaFEV [45]

Answer:

see explanation

Step-by-step explanation:

(a)

Given

2k - 6k² + 4k³ ← factor out 2k from each term

= 2k(1 - 3k + 2k²)

To factor the quadratic

Consider the factors of the product of the constant term ( 1) and the coefficient of the k² term (+ 2) which sum to give the coefficient of the k- term (- 3)

The factors are - 1 and - 2

Use these factors to split the k- term

1 - k - 2k + 2k² ( factor the first/second and third/fourth terms )

1(1 - k) - 2k(1 - k) ← factor out (1 - k) from each term

= (1 - k)(1 - 2k)

1 - 3k + 2k² = (1 - k)(1 - 2k) and

2k - 6k² + 4k³ = 2k(1 - k)(1 - 2k)

(b)

Given

2ax - 4ay + 3bx - 6by ( factor the first/second and third/fourth terms )

= 2a(x - 2y) + 3b(x - 2y) ← factor out (x - 2y) from each term

= (x - 2y)(2a + 3b)

8 0
3 years ago
Write -2x^2 (-5x^2 + 4x^3) in standard form
saul85 [17]
-2x·-2x·(-5x·-5x+4x·4x·4x) Basically, you write out the number depending on the exponent. So if you have a power/exponent of 3, you write it out multiplied by itself 3 times. Hope this helps!
7 0
3 years ago
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