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inysia [295]
3 years ago
15

What is the sum of 4.2 × 105 and 5.3 × 105?

Mathematics
2 answers:
grandymaker [24]3 years ago
4 0
The answer would be 9.5•105. You are supposed to add the beginning numbers since the second numbers are equal to each other meaning that the first numbers are of the base values.
marishachu [46]3 years ago
3 0

Answer: 9.5\times 10^5

Step-by-step explanation:

The given exponents : 4.2\times10^5 and 5.3\times10^5

When we add them together , we get

4.2\times10^5+5.3\times 10^5 \\\\=(4.2+5.3)\times10^5\ \ \text{[By using distributive property } ba+ca=(b+c)a]\\\\= 9.5\times10^5

Hence, the sum of 4.2\times10^5 and 5.3\times10^5=9.5\times 10^5

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3 years ago
3 tomatoes cost $1.29<br><br> How much will 5 tomatoes<br> cost?
wolverine [178]

Answer:

$2.15

Step-by-step explanation:

Since 3 Tomatoes cost $1.29

Then let's first find how much is 1 Tomatoes.

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[RevyBreeze]

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2 years ago
Three painters can paint three walls in three minutes. how many painters are needed to paint 27 walls in nine minutes?
Advocard [28]
There is 3 variable, in this case, painters, walls and time(minutes). You need to find how many painters needed and provided information on the walls and time(minutes).

Increasing walls will cause more painter needed. It was reversed in time which was increased time will cause less painter needed.

In this case, you need to divide the variable walls with time since it reversed so: 27wall/9 minutes
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