Question

A submarine began at sea level and descended toward the ocean floor at a rate of −0.015 km per minute. Its final depth was −0.3675 km. Estimate how long it took the submarine to reach its final depth by rounding the dividend and divisor to the nearest hundredth.

Answer 1

Alright! to begin with, try to round off the values to the nearest hundredths. Try and tell

Answer 2

Perfect! she/he is offline

Answer 3

rip

Answer 4

why would you round to the nearest hundredth.

Answer 5

It's a good practice to do that last

Answer 6

honestly your probably right

Answer 7

I am. When you get into calculus and higher math it really matters

Answer 8

having four spots after the decimal is unneeded

Answer 9

you could probably benefit of of just rounding it to -0.368

Answer 10

oh i never read the whole problem

Answer 11

-0.02 -0.37 right ?

Answer 12

i dont get it

Answer 13

It wants you to find time. And once you do round it

Answer 14

oh ok

Answer 15

I was just saying @goodfellow said to round first, which is not good

Answer 16

i was seriously lost there for a second

Answer 17

You should round your answer when you're done

Answer 18

thank you for the advice by the way I'm a girl

Answer 19

and if you are going to say something, please just say it to me .

Answer 20

if you're trying to spare my fillings it hurts more if you say it behind my back.

Answer 21

@sherixn, @chop - yeah yeah it asks for the time and that can be calculated by simple math.\[\small \text{time} = \frac{\text{distance(dividend)}}{\text{speed(divisor)}}\] But, the thing is, the question asks to estimate the final answer rather than actually calculating it.
And @chop, yes you got it right: \[\small 0.015 \to 0.02\qquad 0.3675 \to 0.37\]And @sherixn , your knowledge about rounding during calculations is solid! And now the answer is clear: a simple division.

Answer 22

@vivian, hope you got the idea behind this math. All the information given under this thread is good for your knowledge.

Answer 23

@vivian, @sherixn, @Chop, can you guys guess why those values are given negative?