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12345 [234]
3 years ago
8

Type your answer in the box provided. Make sure to use complete sentences.

Mathematics
1 answer:
slamgirl [31]3 years ago
5 0

Answer:

A bird drops a stick to the ground from a height of 80 feet. The equation 0=−16x2+64x+80 gives the number of seconds that have passed when it hits the ground. After about how many seconds did the stick hit the ground?

Step-by-step explanation:

h = -16t^2 + 80   Stick hits the ground when h = 0:

0 = -16t^2 + 80    

16t^2 = 80

t^2 = 80/16 = 5

t = POSITIVE root 5 (due to the real world nature of the problem)

t approximately 2.236 seconds.

========================================

Graph is a downward opening parabola with h-intercept of 80, t-intercept(s) of sqrt(5), - sqrt(5)

Symmetric about h-axis, though I would only graph on the right side of the h-axis since  

that is where t >= 0.

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How many squares of any size are in this picture?
mrs_skeptik [129]

Answer:

100

Step-by-step explanation:

There are 100 squares of any size in this photo. If you count the number of squares there are at the top and then count how many there are going down on the side you can multiply those two numbers to get your final answer.

3 0
3 years ago
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If r = 3.2, what is the area of the shaded region? Round your answer to the nearest hundredth. Use your calculator's value of π.
Lunna [17]

Answer:

99.38

Step-by-step explanation:

the area of all the circles by using the formula A=ℼr2 then filling in r with 3.2 A=ℼ3.22=32.2

Knowing that one circle is 32.2 4 circles would have an area of 128.8

Two circles have a combined length and height of 12.8 because the circumference of one circle is 6.4 so two circles reach the sides of the square. So all the sides of the square are 12.8. So finding the area of the square knowing what the sides are, so the area is a=163.84. To find the shaded area you subtract the volume of the square to volume of all 4 circles which is 163.84-128.8 which equals 35.04. Then you find the volume of the semi circle which is 64.34. Then the combination of both shaded regions is 99.38

8 0
3 years ago
Alice's grandmother age is a composite number between 70 and 80. This number has a factor of 11. What number is it ?
bogdanovich [222]
The answer is 77 because the only thing in between 70 and 80 with the factor of 11 is 77
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Unit price = total money / total weight:

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Unit rate is 1.25 per 1 pound

The correct answer would be C.

7 0
3 years ago
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Penelope is making cards for her family members . She completed 9/16 of the cards on Monday and 2/16 on Tuesday . Which fraction
galben [10]
The fraction completed so far is 9/16+2/16=11/16
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