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
mylen [45]
3 years ago
8

A ball is thrown straight up from the top of a building that is 400 ft high with an initial velocity of 64 ft/s. The height of t

he object can be modeled by the equation s(t) = -16t^2 + 64t + 400.
In two or more complete sentences explain how to determine the time(s) the ball is higher than the building in interval notation.
Mathematics
1 answer:
Schach [20]3 years ago
5 0

Answer:

This type of essay answer is pretty short.

You play out the equation and say what each part of the equation means.  The vertex in this case, because it's a downward facing parabola, is the highest point on the graph.  Now since they're kicking a ball, the vertex will be the highest point that the ball will go up to.

Hopefully this helps some.  For full points you'll probably have to add a bit of padding and further explanation.

Step-by-step explanation:

You might be interested in
Identify all the points that are on the foll Gwing quadratic function: y -3x
Valentin [98]
Um use fled but bfthb 123 tgbs
7 0
3 years ago
For which nonnegative value of x is the expression 5+x/25-x^2
erica [24]

Answer:

Step-by-step explanation:

\frac{5+x}{25-x^2} >0\\=\frac{5+x}{(5+x)(5-x)} \\=\frac{1}{5-x} >0\\if~5-x>0\\or~5>x\\or x

8 0
3 years ago
Health and jaydon liked birdwatching and kept track of how many different species they saw at each site. In one day, they busted
bearhunter [10]
You do 5*7=35 and then subtract 35-30 to get your answer 5 less species
6 0
3 years ago
If postage costs $.54 for the first ounce and $.22 for the each additional ounce, calculate the cost of mailing a 10- ounce enve
sweet-ann [11.9K]

Answer:

Hence, the total cost of mailing 10 ounces is:

$ 2.52

Step-by-step explanation:

If postage costs $.54 for the first ounce and $.22 for the each additional ounce.

i.e. cost of first ounce=$ 0.54.

Now let x denote the number of ounces after the first ounce,

Hence, the cost of x ounces=$ (0.22×x)=$ 0.22 x

Hence, the cost of mailing (x+1) ounces is: $ (0.54+0.22 x)

Now, we have to find the cost of  mailing a 10- ounce envelope.

i.e. after the first ounce we need 9 more ounces.

Hence, the total cost of mailing is calculated as:

=$ (0.54+0.22\times 9)\\\\=$ (0.54+1.98)\\\\=$ 2.52\\

Hence, cost of mailing 10 ounces is:

$ 2.52

8 0
3 years ago
Read 2 more answers
78 million converted in scientific notation
Lemur [1.5K]

The <em><u>correct answer</u></em> is:

7.8 × 10⁷

Explanation:

To write a number in scientific notation, we want the decimal behind the first non-zero digit in the number. The first non-zero digit in 78 is 7; this means we want 7.8. In order to have the decimal point behind the 7, we need to move the decimal 7 places. This is the exponent of 10 in our scientific notation, which gives us

7.8 × 10⁷

7 0
3 years ago
Other questions:
  • The product of a number w and 73
    6·1 answer
  • What is the slope of the line?
    8·2 answers
  • a shop sells sweets in bags of 7 and 20 what is the largest number of sweets that cannot be purchased exactly?
    11·1 answer
  • Maurice's family put a pool into their backyard. It is rectangular in shape and its dimension are 20 feet by 10 feet by 10 feet.
    6·1 answer
  • Use either box, foil, or distribution method in order to multiply and solve
    7·1 answer
  • Which algebraic expression represents the phrase "the quotient of negative eight and the sum of a number and three"
    7·1 answer
  • How many more students arrive by school bus than by car?
    13·1 answer
  • What is 8y squared+7y+4-3(2y squared-5y-8)?
    15·1 answer
  • a bank loaned out $18,000, part of it at the of 8% per year and the rest at 16% per year. if the interest received in one year t
    9·1 answer
  • WILL CHOOSE BRAINLIEST. Choose the best estimate of the width of a human hair.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!