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Ivenika [448]
3 years ago
15

Select all of the quantities that are correctly expressed in scientific notation

Mathematics
1 answer:
rjkz [21]3 years ago
4 0
The first one and the last one
You might be interested in
Mary sews at a rate of 60 inches per hour. How many feet does she sew in a minute?
makvit [3.9K]

Answer:

B. 0.083 rounded to the nearest thousandth.

Step-by-step explanation:

It is known that 12 inches = 1 foot and

60 minutes = 1 hour

Since we want to covert from inches per hour to feet per minute, then we would change 60 inches to feet in 1 hour 2 minutes in divide.

If 12 inches = 1 foot, then

60 inches = 60/12 = 5 feet

Therefore, the number of feet that she sews in a minute is

5/60 = 0.083 feet per minute

She sews 0.083 feet per minute.

This is the full explanation for this question.

5 0
3 years ago
Totally forgot how to do this, please help.
ddd [48]

Answer:

-2/21 is the answer hope it helps

3 0
3 years ago
Which equation has only one solution? A lx-5l=1 B l-6-2xl=8 C l5x+10l=10 D l-6x+3l=0​
dem82 [27]

Answer:

D:  x = 1/2

Step-by-step explanation:

D is correct.  The solution here is the solution of -6x + 3 = 0, which is x = 1/2.

5 0
3 years ago
Determine two numbers that have a product of 40 but have a sum of 13.
Paha777 [63]

Answer:

The two numbers are 8 and 5.

Step-by-step explanation:

Let consider x and y to be these two numbers.

So;

(x) * (y) = 40 ---- (1)

x + y     = 13 ----- (2)

From (2), let x =  13 - y

Then;

(13 - y) * y = 40

13y - y² = 40

13y - y² - 40 = 0

-y² + 13y - 40 = 0

Multiply through by (-)

y² - 13y + 40 = 0

By factorization;

(y - 8) (y - 5) = 0

y = 8 or  y = 5

CHECK:

8 * 5 = 40

8 + 5 = 13

Therefore, the two numbers are 8 and 5.

8 0
3 years ago
First find the estimate of the quotient then find the exact quotient 3 3/7 divide by 1 4/9
svet-max [94.6K]
Estimate of the quotient:
3 3/7 = 3+0.428571=3.428571
1 4/9 = 1+0.444444=1.444444
(3 3/7) / (1 4/9) = 3.428571 / 1.444444 = 2.373627

Estimate of the quotient: 2.373627

Exact quotient:
3 3/7=(7*3+3)/7=(21+3)/7=24/7
1 4/9=(9*1+4)/9=(9+4)/9=13/9

(3 3/7) / (1 4/9) = (24/7) / (13/9) = (24/7)*(9/13)=(24*9) / (7*13)=216/91

Exact quotient: 216 / 91 = (182+34) / 91 = 182 / 91 + 34 / 91 = 2 34/91

Exact quotient: 216/91 = 2  34/91
4 0
3 years ago
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