All categories

2 years ago

A ball is thrown from an initial height of

Mathematics

1 answer:

Eduardwww [97]2 years ago

8 0

Answer:

Step-by-step explanation:

If we are looking for the times that the ball was 11 meters off the ground, we sub in 11 for the height on the left and solve for t:

$11=-5t^2+30t+1$ and

$0=-5t^2+30t-10$ and factor this however it is you are factoring in class to solve for t to get

t = .35 seconds and t = 5.6 seconds

Because the ball reaches this point in its way up and then passes it again on its way down, the ball will have 2 times at this height.

You might be interested in

find the area of each sector. Use the 3.14 as the value of pi. Round your answer to the nearest tenth. Part 4

Yuri [45]

Answer:

1) 378.1 in²

2) 8.4 m²

Step-by-step explanation:

Area of sector= $\frac{θ°}{360°} \times \pi {r}^{2}$

1) Area of sector

$= \frac{150°}{360°} \times 3.14 \times {17}^{2} \\ = 378.1 \: in^{2} \\ (nearest \: tenth)$

2) Area of sector

$\frac{60°}{360°} \times 3.14 \times {4}^{2} \\ = 8.4 \: m^{2} \\ (nearest \: tenth)$

7 0

2 years ago

One hundred times the quantity five plus three

Maru [420]

Five-5

three-3

"the quantity five plus three" (5 + 3)

"one hundred times the quantity ..." means 100 (5 + 3)

now just solve 100(5+3)

solve the parentheses first (5+3) = 8

Now you are left with 100(8) or 100*8

when you solve your answer is 800

3 0

2 years ago

Consider the polynomial function (x+3)(x+9)(x-8)=0. which of the following are zeros of the function? Select all that apply. -9

Crank

Zeros are:

$-3$
$-9$
$+8$

Looks like only $-3$ and $-9$ are offered as answers, though.

6 0

3 years ago

Which of the following pertains to the entire group being considered ina study

exis [7]

Answer: Population

In statistics, a population is the entire group of people you want to determine some fact about (eg: average height). A sample is a subset of the population that should ideally represent the population.

8 0

3 years ago

Determine the unknown angles in the diagram above. Please help!

Nana76 [90]

a and 143 are supplementary. So a + 143 = 180

a + 143 = 180 Subtract 143 from both sides.

a = 180 - 143

a = 37

b and 143 are vertically opposite angles and are equal

b = 143 degrees.

Interior angles on the same side of a transversal for parallel lines are supplementary

b + c = 180

143 + c = 180

c = 37

c + d + 85 = 180 degrees

37 + d + 85 = 180

d + 122 = 180

d = 180 - 122

d = 58

e = c They are vertically opposite.

e =37

All triangles have 180 degrees.

e + f + 90 = 180 degrees.

37 + f + 90 = 180

f + 127 = 180

f = 180 - 127

f = 53

G and 48 are opposite 2 equal sides. So G and 48 are equal

G = 48

h + 48 + 48 = 180

h + 96 = 180

h = 84

K and H are supplementary

K + H = 180

k + 84 = 180

k = 95

m+ k + d = 180

M + 95 + 58 = 180

M + 143 = 180

M = 37

the top angle is 2*m and 2m is bisected. You are using the m on the left.

P + 85 + M = 180

P + 85 + 37 = 180

P + 122 = 180

p = 180 - 122

p = 58

r + p are supplementary.

r + p = 180

r + 58 = 180

r = 180 - 58

r = 122

s + r + c + b = 360 All quadrilaterals have 360 degrees.

s + 122 + 37 + 143 = 360

s + 302= 360

s = 360 - 302

s = 58

6 0

3 years ago