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zimovet [89]
3 years ago
14

Which of the following is the same as 8.4 × 10 to the second power?

Mathematics
2 answers:
Bess [88]3 years ago
4 0
I believe the answer would be C.) 840
stich3 [128]3 years ago
3 0
1) 8.4 \times 10^{2}  is the same as 8.4 \times 100 because the order of operations state to perform the exponents before multiplication. 
8.4 \times 100 = 840

The answer is C) 840

2) I'm assuming the second thing you said was a typo, but 8.4 × 10*2 is the same as 8.4 x 20, for the same reason above. 8.4 x 20 = 168.
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Matt's pool table is 3 feet wide and 9 feet long. Matt wants to replace the felt on the pool table. The felt costs $4.00 per squ
RoseWind [281]

Answer:

$108

Step-by-step explanation:

3X9= 27square foot. Then you multiply 27 by 4, which equals $108

4 0
3 years ago
Squareroot(y-1) + 3 = y
jek_recluse [69]
Note:xy means x times y and x(y) means the same thing

so
first we get rid of square root then
make the equation equal to zero becaues if
xy=0 then x or/and y=0



squareroot(y-1)+3=y

isolate the squareroot
subtrac 3 from boht sides

squareroot(y-1)=y-3

square both sides (since they are equal, you should be able to square both sides and still make it true)

(squareroot(y-1))^2=(y-3)^2
(y-1)=(y-3)(y-3)
y-1=y^2-6y+9
subtrac y from both sides
-1=y^2-7y+9
add 1 to both sides
0=y^2-7y+10
find what two number multiply to make 10 and add to get -7
the answer is -2 and -5

0=(y-5)(y-2)
therfore
y-5=0
and/or
y-2=0

therefor
y=5 or/and 2 might work
let's try out 2
square root(2-1)+3=2
square root(1)+3=2
1+3=2
false
so 2 doesn't work



let's try 5
squareroot(5-1)+3=5
squareroot(4)+3=5
2+3=5
5=5
true

y=5
7 0
3 years ago
Which equation is correctly setup to solve for x?
AURORKA [14]

The formula for the hypotenuse of a triangle is:

[a squared] plus [b squared] = c squared

a and b represent the two sides of the triangle.

You would have to square 8 and 4, add them, then take the square root of it to find the length of the hypotenuse.

<h2>The first equation is correct.</h2>
5 0
3 years ago
A scale model of a bicycle has a scale of 1 : 10. The real bicycle has a length of 1.6 m. What is the length of the model in cm?
garri49 [273]

Answer:

16 cm

Step-by-step explanation:

1.6 m = 160 cm

Model length = 160 / 10 = 16 cm

7 0
3 years ago
Read 2 more answers
Carmelo is selling his hockey and baseball card collection. Hockey cards, x, sell for $0.03 and baseball cards, y, sell for $0.0
svlad2 [7]

Answer:

$28.50 is the answer

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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