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Zinaida [17]
4 years ago
12

Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 m wide by 15.0 m lon

g. A. 212 m^2 B. 211.5 m^2 C. 29.1 m D. 29.10 m
Mathematics
1 answer:
Paladinen [302]4 years ago
6 0
<h3>Answer: Choice A) 212 square meters</h3>

========================================================

Explanation:

14.10 has four sig figs. The 0 at the end is significant. This measurement is accurate to the hundredths place. If the author wrote 14.1, then it would be accurate to the tenths place with three sig figs.

15.0 has three sig figs. The 0 is significant. If they wrote 15 or 15. then we'd be dealing with 2 sig figs instead; however they placed the 0 there to tell the reader "this measurement is accurate to the tenths place"

---------------------

Multiply the values given

14.10*15.0 = 211.5

Round that to three sig figs. We pick the smaller sig fig count to round to since we cannot be certain it is accurate to four sig figs. In a sense, we pick the weakest link and use that to determine rounding when it comes to multiplication and division.

This means 211.5 rounds to 212

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Polynomials are closed under addtiion because when you add polynomials the letters and their exponents do no change, you just add the coefficients of the like terms (those with same letters raised to the same exponents), so the result will be other polinomyal of the same kind, except for the terms that cancel (positve with negative) which does not change the fact that the result is still a poynomial.

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5 0
3 years ago
Friends have a party. Joyce invited 17 friends to a dinner party at her house last Friday
OLEGan [10]

Answer:

15

Step-by-step explanation:

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Of all  the possible combinations,

1 and  15 is a perfect match for a perfect square

So,Joyce dinner partner was number 15.

5 0
2 years ago
Is a quadratic sequence (2,3,6,11) arithmetic, geometric, or neither?
Karolina [17]

Answer:

Neither

Step-by-step explanation:

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3 0
3 years ago
David rowed a boat upstream for three miles and then returned to point he started from. The entire journey took four hours. The
CaHeK987 [17]
To solve for the time it takes to travel a certain distance at a certain speed, use the formula,
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Given that the entire journey takes four hours, add up the time it takes David to row upstream with that of him travelling downstream. This is mathematically represented as,

                              total time = time upstream + time downstream

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Solving for x in the equation gives 2. Thus, David's speed in still water is 2 miles per hour. 
7 0
3 years ago
the function y=180,000(1.2)^t represents the attendance, y, at a music festival t years after 2010. How many people attended the
EleoNora [17]
From 2010 year to 2015 year 5 years passed, then t is equal to 5.
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Answer: 447,898 p. attanded festival in 2015

4 0
3 years ago
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