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SVETLANKA909090 [29]
3 years ago
9

Which of the following expressions is written in scientific notation?

Mathematics
2 answers:
balu736 [363]3 years ago
6 0

Lesson 2: Scientific Notation quick check

1. D) 4.22x10^-3

2. A) 7.08x10^-8

3. A) 6.1x10^-7

4. D) 1.25x10^-4

5.C) Doubling n results in doubling the value of the expression.

6. B) 2.45x10^5

7.A) 3x10^3

Please use this for double checking your answers!

Afina-wow [57]3 years ago
5 0
a\cdot10^n\ is\ scientific\ notation\ if\ a\in\left 10)\\\\b)\ 0.09\cdot10^7-NO-(0.0910)\\\\d)\ 4.22\cdot10^{-3}-YES
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PLS HELP ASAP !!!! Giving brainlist!
Mice21 [21]

First one (on the left) is 2) associative property because we are regrouping terms or re-associating them based on the parenthesis. Think of the parenthesis like a tent or a house that separates off the stuff outside. First 27 and 36 are grouped, then we move the parenthesis so that 52 and 27 are grouped now.

Second one (on the right) is 1) commutative. The commutative multiplication property says we can multiply two numbers in any order. For example, 4*9 = 36 and 9*4 = 36. The 4 and 9 swap places. In this problem, the 3 and 4x swap places. The use of parenthesis isn't necessary, though it is sometimes used to imply multiplication.

4 0
3 years ago
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the temperature is already at 40 degrees it rises 4.5 degrees per minute how long will it take to get to 76 degrees​
Andrei [34K]

Answer:

It will take 8 minutes for the temperature to reach 76°

Step-by-step explanation:

The expression for the total temperature in degrees at time t can be written as;

T=I+EM

where;

T=total temperature

I=initial temperature

E=temperature increase per minute

M=number of minutes

This can also be written as;

total temperature=initial temperature+temperature increase per minute×number of minutes

In our case;

T=76°

I=40°

E=4.5°

M=m

replacing;

76=40+(4.5×m)

4.5 m=76-40=36

(4.5 m)/4.5=36/4.5

m=8

It will take 8 minutes for the temperature to reach 76°

7 0
3 years ago
Johnny saw that the temperature on the outside thermometer was 59°F.
dedylja [7]
A tshirt and jeans, or shorts
7 0
3 years ago
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Please can someone tell me whether my answer to the question is right? The topic is simultaneous equations.
ELEN [110]
X should equal -13.33. Y is correct, 13.33
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3 years ago
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Look at the picture below for the info
attashe74 [19]

Answer:

x = -3/14

Step-by-step explanation:

1/2(2x-1) = -1/7 -4/7

Combine like terms

1/2(2x-1) = -5/7

Multiply each side by 2

2*1/2(2x-1) = -5/7*2

2x-1 = -10/7

Add 1 to each side

2x-1+1 = -10/7 +1

2x = -10/7 +7/7

2x = -3/7

Divide by 2

2x/2 = -3/7 *1/2

x = -3/14

3 0
2 years ago
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