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Vedmedyk [2.9K]
3 years ago
6

Josefina hit a tennis ball into the air with an

Mathematics
1 answer:
max2010maxim [7]3 years ago
8 0
7 = -16t2 + 16t + 3
7 = t2 + 3
7 -3 = t2 + 3 - 3
4 = t2
square root of 4 = square root of t2
2 = t
2 seconds
You might be interested in
What is the range of f(x) = 3x + 9?
ziro4ka [17]

Answer:

The range is all real numbers.

Step-by-step explanation:

The function shown is a line (and not a horizontal line).

The range is all the y's on the graph or all the y's that can be generated by the equation of the function.

f(x) = 3x + 9

You could put ANY, literally any, number in place of the f(x) and be able to calculate an x for it. Looking at the graph of this line, you could go up and down the y-axis to infinity in either direction, and the graph of the line would be there.

The range is All Real Numbers.

5 0
2 years ago
Can someone please answer this ‍♀️
Marianna [84]
A) JL and JK

Because you must always start from top to bottom and left to right.
7 0
3 years ago
It is estimated that 4000 of the 10,000 voting residents of a town are against a new sales tax. If 15 eligible voters are select
Alenkasestr [34]

Answer:

The probability that at most 7 favor the new tax is 0.7869

Step-by-step explanation:

Total number of voting resident = 10000

number of voting resident against new sales tax = 4000

therefore probability of choosing a voting resident against new sales tax = 4000/10000 = 0.4

If 15 eligible voters are selected at random and asked their opinion, what is the probability that at most 7 favor the new tax

Using binomial,

number of selected voters(n) =15,

p=0.4

P(x<=0.7) = binomialcdf(15, 0.4, 7)

Using your calculator

P(x<=0.7) = binomialcdf(15, 0.4, 7) = 0.7869

3 0
3 years ago
Another easy one, 30 points + Brainliest
Andrew [12]

<u>1.03*10^{6}>9.8*10^{5</u>

Answer:

4.01*10³<5*10^(-5)false

3.9*10^5<8.06*10^{-7}false

1.03*10^{6}>9.8*10^{5}true

7.8*10^{2}>2.1*10^{3}false

7 0
3 years ago
Read 2 more answers
Which expression can be used to determine the length of segment ZY? See image.
mixer [17]

Answer:

\sqrt{8^{2} + 3^{2} }

Step-by-step explanation:

We see that this is a rectangle triangle, and that the ZY side is the hypotenuse.

It's length is then square root of the sum of the squares of the other sides:

hyp = \sqrt{a^{2} + b^{2} }

So, in this case:

ZY = \sqrt{8^{2} + 3^{2} }

The 8 and 3 numbers are easy to get from the graphic... and the order doesn't matter (8² + 3² = 3² + 8²).

That's an easy rule to remember.

I hope it helps.

6 0
3 years ago
Read 2 more answers
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