1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Misha Larkins [42]
3 years ago
10

Can someone please help me answer this question

Mathematics
2 answers:
Allushta [10]3 years ago
7 0

Answer:

720

Step-by-step explanation:

60 minutes in a hour. So add 30 for each 20 minutes so it would be 90 an hour so multiply 90 by 8

igomit [66]3 years ago
7 0

Answer:

720 widgets

Step-by-step explanation:

there are 60 minutes in hour

multiply that by 8 hours

you get 480

divide that by 20

multiply that by 30

the answer is 720 widgets

You might be interested in
PLEASE HELPPP!!!
Tems11 [23]

Answer:

a) -16t^{2}+64t\geq40

b)[2-\frac{\sqrt{6}}{2} , 2+\frac{\sqrt{6}}{2}]

(see attached picture for the number line)

This interval means that from about 0.78s to about 3.22s the ball will not be visible because it will be higher than 40 feet high.

c) h_{max}=64ft

d) t=2s

Step-by-step explanation:

a)

Basically the ball will disappear when it is higher than 40 ft, so we can build the inequality like this:

-16t^{2}+64t\geq40

this is because the function represents it's height, so when the function is greater than or equal to 40, then the ball will disappear.

b) to solve the inequality, first we need to turn the ≥ symbol to an = symbol and solve for t, so we get:

-16t^{2}+64t =40

we can move the 40 to the other side of the equation so we get:

-16t^{2}+64t-40=0

we can factor the equation so it's easier to solve, so we get:

-8(2t^{2}-8t+5) =0

which simplifies to:

2t^{2}-8t+5=0

and we can use the quadratic formula to solve this equation, so we get:

t=\frac{-b\pm\sqrt{b^{2}-4ac}}{2a}

so we get:

t=\frac{-(-8)\pm\sqrt{(-8)^{2}-4(2)(5)}}{2(2)}

which yields:

2\pm \frac{\sqrt{6}}{2}

and next we need to test the posible intervals to see which one makes the inequality true, the possible intervals are:

(-\infty, 2-\frac{\sqrt{6}}{2}]  for a test value of 0

[2-\frac{\sqrt{6}}{2},2+\frac{\sqrt{6}}{2}] for a test value of 1

[2+\frac{\sqrt{6}}{2},\infty) for a test value of 4

so next we test each of the values in the original inequality and see if the inequality is true:

(-\infty, 2-\frac{\sqrt{6}}{2}] for a test value of 0

-16(0)^{2}+64(0)\geq40

0\geq40 false

so this is not an answer.

[2-\frac{\sqrt{6}}{2},2+\frac{\sqrt{6}}{2}] for a test value of 1

-16(1)^{2}+64(1)\geq40

48\geq40

true, so this is an answer.

[2+\frac{\sqrt{6}}{2}, \infty) for a test value of 4

-16(4)^{2}+64(4)\geq40

-16(16)+64(4)\geq40

-256+256\geq40

0\geq40

false, so this is no answer.

So the answer is the interval:

[2-\frac{\sqrt{6}}{2},2+\frac{\sqrt{6}}{2}]

This interval means that from about 0.78s to about 3.22s the ball will not be visible because it will be higher than 40 feet high.

c) In order to find how high Penelope kick the football, we must find the vertex of the parabola which is gotten when graping the given function (see attached picture)

so we can use the following formula to find the t-value for this maximum height:

t=-\frac{b}{2a}

so we substitute the corresponding values:

t=-\frac{64}{2(-16)}

which yields:

t=2s

next, we can substitute this time into the original function to find the maximum height, so we get:

h=-16(2)^{2}+64(2)

which yields:

h=64 ft

d) We found the answer for d on the previous part where we got that t=2s

6 0
3 years ago
What’s the length of AZ. If A is between Y and Z, Y A = 22, AZ = 16x, and Y Z = 166
VLD [36.1K]

Answer:

c) 144

Step-by-step explanation:

Since A is between Y and Z,

YZ = YA + AZ

116 = 22 + 16x\\16x = 116 - 22\\16x = 144\\x = 9

however, the question asks for the length of AZ, not the value of x.

Thus,

AZ = 16x

AZ = 16\\ × 9

AZ = 144

7 0
2 years ago
11499 round to the nearest thousand
Likurg_2 [28]
You forgot to put the decimal in there so i could round it 

4 0
3 years ago
Read 2 more answers
Eunice buys dog bed with a listed price of $31. Eunice uses a sale that provides 30% off. What is the total
Pachacha [2.7K]

Answer:

21.70

Step-by-step explanation:

First find the discount

31 * 30%

31 *.30

9.3

Subtract from the original amount

31 - 9.3

21.70

3 0
3 years ago
Solve 5x3/4 as a mixed number, plz
lana [24]
Multiply straight across
5/1 * 3/4 = 15/4
now change it into a mixed number
3 3/4


4 0
3 years ago
Other questions:
  • Write an equation of the line passing through each of the following pairs of points. a (−10, 4), (2, −5)
    10·1 answer
  • A car travels 60 km on 8 litres of gas. How many km will it<br>travel on 18 litres of gas?​
    5·2 answers
  • The construction shows angles CAB and IDE. There is a circle created from point A that intersects with ray AC, creating point F,
    9·2 answers
  • Percentage of 115/192
    6·1 answer
  • Help quickly for 5 stars and brainliest!
    13·1 answer
  • 20: 5/3 in lowest terms
    6·2 answers
  • How many solutions does the equation 2x -1 = x + x -1 have ?
    6·1 answer
  • Given PQR is congruent to STU, find the value of x​
    6·1 answer
  • What is the probability of spinning a yellow?
    9·1 answer
  • PLEASE HELP! You are covering the metal wedge below with a thin layer of high-conducting silver (surface area). The measurements
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!