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2 years ago

A bag of flour weighs 5 lb. 5/7 lb of flour was used to make bread. How many

Mathematics

1 answer:

Natalka [10]2 years ago

7 0

Answer:

Step-by-step explanation:

5/1 - 5/7

35/7 - 5/7

= 30/7 = 4 2/7 lb

Multiply the denominators, 7 by 5,and 1 by 7. When you have the same denominator in each fraction you can subtract. (7x4= 28, 30-28= 2)

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If tan A= 1,what is the value of A

xxMikexx [17]

Answer:

45°

Step-by-step explanation:

Ok, so, there is one thing I need to point out. 45° is the 'main' value if you assume 0°<A<180°. However, sin, cos, and tan have different periods which means that there are infinite values of A where tanA = 1. The general notation that you could put is A = 45° + (n*180°) where n is just a number. For example, if n = 1, you would get an angle of 225°. If you plug tan225° into the calculator, you get 1. If you did radians, you could write A = $\frac{\pi}{2} + n\pi$ . But ignore that if you haven't. Basically, the answer would be 45° if you are assuming A is between 0° and 180°. Also, you could have just used your calculator and types inverse tan function ( $tan^{-1}$ ) and plug in 1 to find the primary answer of 45.

6 0

3 years ago

The truck's tank is a stainless steel cylinder. Find the surface area of the tank. Round your answer to the nearest hundredth.

Feliz [49]

Answer:

Area of the truck tank is $1356.48ft^2$

Step-by-step explanation:

It is given height of the cylinder h = 50 ft

Radius of cylinder is r = 4 ft

Surface area of the cylinder is equal to

$A=2\pi rh+2\pi r^2$

Now putting the value of r and h

$A=2\times 3.14\times 4\times 50+2\times 3.14\times 4^2$

$=1356.48ft^2$

Therefore area of the truck tank is $1356.48ft^2$

8 0

3 years ago

The number of sit-ups that all tenth-grade girls can do in 5 minutes is normally distributed. beth surveyed 20 of her fellow int

Luda [366]

The true statement is as follows "No because she did not use a simple random sample".

<h3>What is random sampling?</h3>

Random sampling is the method to choose the given samples of observation to make assumptions about the population.

It is given that

Population: All tenth-grade girls

Sample: 20 intramural tennis players

The 20 intramural tennis players cannot represent all tenth-grade girls.

This is so because the selection is biased here, and it could not be used to make inferences about the overall population. then she did not use a simple random sample.

Hence, the true statement is (b)