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Alexxandr [17]
3 years ago
10

Help please! 15 points!

Mathematics
1 answer:
Ivan3 years ago
5 0
It’s 3!! I checked on a calculator :)
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The function f(x) = –4x2 represents the path of a whale as it surfaces for air and dives again. Select all the observations that
lara31 [8.8K]

Answer:

The correct option is;

E. The whale touches the surface at the maximum

Please find attached the whale motion diagram

Step-by-step explanation:

The given function is f(x) = -4·x²

Therefore, we have;

x,            f(x)

-5,           -100

-4,           -64

-3,           -36

-2,           -16

-1,              -4

0,                0

1,               -4

2,              -16

3,              -36

4,              -64

5,              -100

Which is the gives the singular maximum value for f(x) at x = 0, which is the surface of the water where the whale reaches for air

The errors in the other options are

A. The domain is always real

B. The range is (-∞, 0)

C. There is only one point where the whale touches the surface at x = 0

D. The values of f(x) initially rises, hen descends as the whale moves to the surface of the water and then descends.

3 0
3 years ago
Need help on #s 9 10 and 11 thx!
VikaD [51]
9 is D. 10 is A. And 11 is either A or B. I am unsure about that last one...
I hope that helped. if I am wrong please correct me I like to learn from mistakes. but I am pretty sure that they are right...
3 0
3 years ago
Read 2 more answers
Determine the circumference of a circle with a radius of 4 units.
timurjin [86]
I learned this a few months ago i know how to do it but I don’t want to give you the wrong answer
6 0
2 years ago
A kite was broken into two triangles of the same size and shape. The area of each triangle is square centimeters. The total area
Lera25 [3.4K]

Answer: Each triangle:40 cm²

Kite : 80cm²

Step-by-step explanation:

The area of a triangle is

1/2bh

The height of the triangle is

h=1/2(10)=5cm

and the base is 16 cm.

The area of each triangle is

= 1/2(16)(5)=40cm^2

2. The total area of the kite is 2 times the area of one triangle.

= 2*40=80cm^2

3 0
3 years ago
Find the periodic withdrawals PMT for the annuity given. HINT [See Example 4.] (Assume end-of-period withdrawals and compounding
Anettt [7]
It depends on if the interest rate of 6% is nominal or not.  The question doesn't specify.  Let's assume that is is a nominal rate, compounded monthly.
Start with 100000 = x * a angle 132 at .5% per month
This becomes 100000 = x * (1-1.005^-132)/.005
Which becomes (100000(.005))/(1 - 1.005^-132) = x
So x is the PMT, which is 1036.70.
8 0
3 years ago
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