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amid [387]
3 years ago
10

Write 0.000021 in scientific notation.

Mathematics
2 answers:
astraxan [27]3 years ago
7 0

Answer:

2.1 × 10^-5

Step-by-step explanation:

Aliun [14]3 years ago
5 0

Answer:

2.1 x 10^{-3}

Step-by-step explanation:

Hope this helps!

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Please help me find the surface area and volume
Lady_Fox [76]

Answer:

3) SA= 64 V=28

4) SA= 192 V=144

5) SA=179 V=144

6) SA=60 V=24

3 0
2 years ago
Help please guys i need help
ra1l [238]

The area is found by multiplying the length by the width.

The original area = 60 x 40 = 2,400 square feet

He wants to make it 1/2 that size, so the new size would be 2,400 / 2 = 1,200 square feet.

To find the length divide the new area by the new width:

1,200 / 30 = 40

The new length should be 40 feet.

6 0
3 years ago
Two number cubes are rolled sequentially. What is the probability that the first number cube shows a five and the other number c
nexus9112 [7]

The probability of first number cube shows a five and the other number cube shows an even number is \frac{1}{12}.

Solution:

Two cubes are rolled sequentially.

Sample space when two dies are rolled

                   =\left\{\begin{array}{l}{(1,1),(1,2),(1,3),(1,4),(1,5),(1,6)} \\{(2,1),(2,2),(2,3),(2,4),(2,5),(2,6)} \\{(3,1), 3(, 2),(3,3),(3,4),(3,5),(3,6)} \\{(4,1),(4,2),(4,3),(4,4),(4,5),(4,6)} \\{(5,1),(5,2),(5,3),(5,4),(5,5),(5,6)} \\{(6,1),(6,2),(6,3),(6,4),(6,5),(6,6)}\end{array}\right\}

Number of sample space = 36

Even numbers getting when two cubes rolled are 2, 4, 6.

First number cube shows a five and the other number cube shows an even number = {(5, 2), (5, 4), (5 6)}

Number of first number cube shows a five and the other number cube shows an even number = 3

Probability of first number cube shows a five and the other number cube shows an even number

                 $=\frac{\text{Number of outcomes}}{\text{Total number of sample space}} $

                $=\frac{3}{36}

                $=\frac{1}{12}

Hence, the probability of first number cube shows a five and the other number cube shows an even number is \frac{1}{12}.

8 0
3 years ago
3x+3=-2-12 how to solve
zhenek [66]
3x+3=-2-12
Combine the -2 and -12 and it'll get you:
3x+3=-14
Then combine like terms on both sides (subtract 3 on both sides):
3x= -17
Then divide 3x from both sides:
-5.66 (repeating decimal)
3 0
3 years ago
Read 2 more answers
Which of the following systems of equations has no solution?
Law Incorporation [45]
For option d:
5x - 7y = 10 . . . . . (1)
10x - 14y = 8 . . . . (2)

(1) x 2 => 10x - 14y = 20 . . . . . (3)

(2) - (3) => 0 = -14              [not possible]

Therefore, the set of equations in option d, has no solutions.
7 0
3 years ago
Read 2 more answers
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