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MAXImum [283]
3 years ago
11

Express the following in scientific notation: 0.0000079

Mathematics
2 answers:
makkiz [27]3 years ago
5 0

Answer:

Hey there!

7.9 × 10-6 is your answer.

Hope this helps :)

Law Incorporation [45]3 years ago
4 0

Answer:

7.9 * 10 ^-6

Step-by-step explanation:

Move the decimal 6 places to the left so there is one number before the decimal

0.0000079

7.9

The exponent is -6  ( negative because we moved it to the left)

7.9 * 10 ^-6

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On the first part of her trip Natalie rode her bike 16 miles and on the second part of the trip she rode her bike 42 miles. Her
-BARSIC- [3]

Answer:

14 mph   ( average speed during the second part of the trip )

Step-by-step explanation:

Let´s call  "x"  the average speed during the first part then

t = 5 hours

t  =  t₁  +  t₂        t₁   and  t₂   times during part 1 and 2 respectively

l = t*v           (  distance is speed by time )      t =  l/v

First part

t₁  = 16/x        and      t₂  = 42 / ( x + 6)

Then

t =   5   =  16/x   +   42 /(x + 6)

5 = [ 16 * ( x  +  6 ) +  42 * x ] / x* ( x + 6 )

5 *x * ( x + 6 )  =  16*x  + 96 +  42 x

5*x² + 30*x  - 58*x - 96  =  0

5*x²  -  28*x  -  96  =  0

We obtained a second degree equation, we will solve for x and dismiss any negative root since negative time has not sense

x₁,₂  =   [28 ± √ (28)² + 1920  ] / 10

x₁,₂  = ( 28  ± √2704 )/ 10

x₁  = 28  -  52 /10        we dismiss that root

x₂  = 80/10

x₂  =  8 mph       average speed during the first part, and the average speed in the second part was 6 more miles than in the firsst part. then the average spedd dring the scond part was 8 + 6 = 14 mph

6 0
3 years ago
I really need help I'm stuck on this question please help
vagabundo [1.1K]
Isnt it 15?? since theyre all suppose to be the samw
6 0
3 years ago
The difference of the quotient m and 9 and the quotient of n and 30
Zanzabum
Answer: (30m-9n)/270

First we start with m/9-n/30.

We multiply the denominators to get 270.

Then we multiply the numerators by the original denominators to get (30m-9n).

To check, we can use m=2, and n=4

2/9-4/30=4/45

(30*2-9*4)/270=24/270=4/45
5 0
3 years ago
What is the second digit of pi?
Ne4ueva [31]
1. Pi is usually referred to as 3.14, so the answer is 1

2. b) Endless

3. d) √5

4. a) 1/27

5. c) Irrational Numbers

I hope this helps! Let me know if you would like an explanation as to how I got the answers :)
5 0
3 years ago
(5a-5)(2a+2)<br> Find each product
weeeeeb [17]
(<span>5a-5)(2a+2)
= 5a*2a -5*2a + 2*5a - 5*2
= 10a^2  - 10a + 10a  - 10
= 10a^2 - 10


The product of the equation is </span>10a^2 - 10
6 0
3 years ago
Read 2 more answers
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