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guajiro [1.7K]
3 years ago
8

Please help with this worksheet real numbers

Mathematics
1 answer:
Rufina [12.5K]3 years ago
6 0

I DO NOT KNOW JUST GIVE ME A SECOND.

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melissa bought a cake that cost $75 the sales tax rate is ten percent what is the total amount she paid for the cake
Nady [450]
Multiply, because the total price is ten percent more than the original:                            $75 x 1.1 = <span>$82.5</span>
6 0
3 years ago
Kayla got 18 out of 20 questions correct on a science test what percentage of the questions did kayla get correct
Ksju [112]

18/20=0.9

Move decimal two spaces to the right and include percent sign

90%

7 0
3 years ago
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A triangle has sides with lengths of 65 centimeters, 74 centimeters, and 97 centimeters. is it a right triangle?
slava [35]
Nah, it's not a right triangle because, the longest side can't insitude its self
7 0
3 years ago
Bryce intended to swim directly across a stream that is 99 meters wide. But the current caused him to arrive at the opposite sho
Misha Larkins [42]

Answer:

101 meters

Step-by-step explanation:

The direct path across the stream and perpendicular to both sides of the stream is one leg of a right triangle. The 20 meter distance on the arriving side of the stream is another leg of the right triangle. The path he actually took is the hypotenuse of the right triangle.

leg 1 = 99 m

leg 2 = 20 m

hypotenuse = ?

We have a right triangle, and we know the lengths of the two legs. We need to find the length of the hypotenuse, so we can use the Pythagorean theorem.

a^2 + b^2 = c^2

99^2 + 20^2 = c^2

9801 + 400 = c^2

c^2 = 10201

c = sqrt(10201) = 101

Answer: 101 meters

6 0
3 years ago
A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 ce
julsineya [31]

Answer:

The proportion of students whose height are lower than Darnell's height is 71.57%

Step-by-step explanation:

The complete question is:

A set of middle school student heights are normally distributed with a mean of 150 centimeters and a standard deviation of 20 centimeters. Darnel is a middle school student with a height of 161.4cm.

What proportion of proportion of students height are lower than Darnell's height.

Answer:

We first calculate the z-score corresponding to Darnell's height using:

Z=\frac{X-\mu}{\sigma}

We substitute x=161.4 , \mu=150, and \sigma=20 to get:

Z=\frac{161.4-150}{20} \\Z=0.57

From the normal distribution table, we read 0.5 under 7.

The corresponding area is 0.7157

Therefore the proportion of students whose height are lower than Darnell's height is 71.57%

8 0
3 years ago
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