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3 years ago

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Mathematics

2 answers:

OLEGan [10]3 years ago

7 0

The correct answer is 12:16 P.M.

<h3>How to find when did Deb finish eating lunch ?</h3>

According to the problem,

Deb started doing yard work at 9:52 A.M.
After working for 1 hour and 48 minutes, she stopped to have lunch.
It took her 36 minutes to eat lunch.

∴ Time at which Dev finishes her lunch =

9:52 A.M. + ( 1 hour and 48 minutes + 36 minutes )

= 11:40 A.M. + 36 minutes = 12 : 16 P.M.

∴ Deb finish eating lunch at 12:16 P.M.

Find out more information about time calculations here: brainly.com/question/1933707

#SPJ2

NNADVOKAT [17]3 years ago

6 0

You add 1 hour and 46 min to 9:52am and then add another 36min
So deb finished eating her lunch at 12:16pm

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The top of the Boulder Dam has an angle of elevation of 1.2 radians from a point on the Colorado River. Measuring the angle of e

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382.925 feets

Step-by-step explanation:

The solution diagram is attached below :

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radian angle * 180/π = degree angle

1.2 * 180/π = 68.755°

0.9 * 180/π = 51.566°

Height of dam is h:

Using trigonometry :

Tan θ = opposite / Adjacent

Tan 68.755° = h / x

h = x Tan 68.755° - - - (1)

Tan 51.566° = h / (155+x)

h = (155+x) tan 51.566° - - - (2)

Equate (1) and (2)

x Tan 68.755 = (155+x) Tan 51.566

x Tan 68.755 = 155tan 51.566 + x tan 51.566

x Tan 68.755 = 195.32311 + x Tan 51.566

x Tan 68.755 - x Tan 51.566 = 195.32311

x(tan 68.755 - tan 51.566) = 195.32311

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3 years ago