Problem Carroll bikes 111 kilometer east, 444 kilometers north, and then 555 kilometers east again. How far is Carroll from her
starting position, to the nearest tenth of a kilometer?
2 answers:
Answer:
The answer to your question is: 800.4 km
Step-by-step explanation:
Data:
111 km to east
444 km to north
555 km to east
How far is from her starting position?
See the picture please
To do this problem, we must to find the hypotenuse of a right triangle where one cathetus is 444 km and the other one is the sum of 111 and 555km.
them the pythagorean theorem says c² = a² + b²
c² = 444² + (111+555)²
c² = 444² + 666²
c² = 197136 + 443556
c² = 640692
c = 800.4 km
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Answer:
(b)
Step-by-step explanation:
A suitable calculator or spreadsheet can find the matrix product for you. Here, the answer choices differ in their upper left term, so we can determine the correct choice by finding the value of that term. It is the dot product of the first row of B and the first column of A.
(5)(3) +(7)(3) +(3)(2) = 15 +21 +6 = 42
This matches choice B.
