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umka21 [38]
3 years ago
13

What is the product written in scientific notation? (4.5x10^-8) (6x10^-4)A.

Mathematics
1 answer:
WINSTONCH [101]3 years ago
5 0
You can multiply in any order if it's all multiplication.
So you can do (4.5*6)*(10^-8*10^-4)
which equals 27*10^-12

Written in scientific notation is 2.7 * 10^-11 (Since you moved decimal one back, you don't have to move it again in the exponent, hence it becomes 10^-11)
D. is the answer
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How do you solve 2x^2+x=-1?
Olin [163]

Answer:

x = 0.2

Step-by-step explanation:

2x^2+x=-1

4x + x = -1

5x = -1

divide by 5

5x/5 = -1/5

x = 0.2

3 0
3 years ago
ms. ling's cooking class made 3 gallons of blackberry jam and 14 cups of strawberry jam. how many cups of jam did the class make
PtichkaEL [24]
1 gallon=16 cups
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4 0
3 years ago
What is the solution to the linear equation?
Vikki [24]

Answer:

x=-5

Step-by-step explanation:

7 0
3 years ago
What is the answer to 1/8(8x+15)=24
Korvikt [17]

Answer:

x = 177/8

Step-by-step explanation:

First, we must get rid of the fraction by multiplying 8 by both sides.

8 · 1/8(8x + 15) = 24 · 8

1(8x + 15) = 192

8x + 15 = 192

Then we simplify. First subtract 15 from both sides.

8x + 15 - 15 = 192 - 15

8x = 177

Then divide 8 from both sides.

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4 0
3 years ago
What are the two missing sides of the triangle ??
igor_vitrenko [27]
Remark
It's a right triangle so the Pythagorean Theorem applies. All you have to do is put the right things in the right places of the formula.

Givens
a = x
b = x + 4
c = 20

Formula and Substitution.
a^2 + b^2 = c^2
x^2 + (x + 4)^2 = 20^2

Solution
x^2 + x^2 + 8x + 16 = 20 Collect the like terms on the left.
2x^2 + 8x + 16 = 20  Subtract 20 from both sides.
2x^2 + 8x + 16 - 20 = 0  
2x^2 + 8x - 4 = 0         Divide through by 2
x^2 + 4x - 2 = 0

Use the quadratic formula
a = 1
b = 4
c = - 2

\text{x = }\dfrac{ -b \pm \sqrt{b^{2} - 4ac } }{2a} 
 
\text{x = }\dfrac{ -4 \pm \sqrt{4^{2} + 4(1)(2) } }{2} 


From which x = (-4 +/- sqrt(24) ) / 2
x1 = (- 4 +/- sqrt(4*6) ) / 2
x1 = (- 4 +/- 2 sqrt(6) ) / 2
x1 = -2 + sqrt(6)
x2 = -2 - sqrt(6)  This is an extraneous root. No line can be minus.

x1 = + 0.4495
x2 = x + 4 = 4.4495
6 0
3 years ago
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