Cost A=0.6489

take the inverse cosine of both sides

Answers

Answer 1

Answer: I am not quite sure what the question asks for,
But this is what i assume it wants:

Cos A= 0.6489
In this given one, we basically find the size of the angle A
we do cosine inverse on both sides to get the size of the angle A
$cos^(-1)$ : It looks like this in the calculator
$cos^(-1)$ × cos A= $cos^(-1)$ (0.6489)
( $cos^(-1)$ and cos cancels out)
A= $cos^(-1)$ (0.6489)
A=49.54°
check:
cos 49.54=0.6489 (its right!)

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88 litres of milk is bought at rs 50 per litre. if 10 liters of milk is lost by leakage and the remainder is sold at rs 55 per litre, find the gain or loss percent.

Answers

It cost 50*80=4000rs to buy the milk.

The amount earned by selling it is (88-10)*55=4290rs.

The gain is (4290-4000)/4000=0.072=7.25%

A salesperson at a clothing store earns a 2% commission on all sales. How much commission does the salesperson earn on a $300 sale?

Answers

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