Lana has a friend who is deaf and uses sign language to communicate. She can sign about 36 concepts per minute. How many concepts can she sign in a 15
minute period?

Information given:

1. 36 concepts per minute

2. The question is telling us how many concepts can she sign in 15 min period.

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So we know that we have to multiply to find the answer.

36x15 will give us 540 as the answer.

So the answer to your question is 540

I attached a picture for you to see how I had multiply.

Hope this helps! :)

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

$54.99

step-by-step explanation:

$54.99 includes 500 min. if she does not exceed 500 min then her bill is $54.99