3 years ago

A country's population in 1991 was 147 million.

Mathematics

1 answer:

inna [77]3 years ago

3 0

175 million estimate in 2017

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a water balloon is tossed into the air with an upward velocity of 25 ft/s its height h(t) in ft after t seconds is given by the

Montano1993 [528]

When the height is 0 that is when it hits the ground
solve
0=-16t²+25x+3
cant factor so use quadratic formula

for
0=ax²+bx+c
$x=\frac{-b+/-\sqrt{b^2-4ac}}{2a}$

so for
0=-16t²+25t+3
a=-16
b=25
c=3
so

$x=\frac{-25+/-\sqrt{25^2-4(-16)(3)}}{2(-16)}$
$x=\frac{-25+/-\frac{625+192}}{-32}$
$x=\frac{-25+/-\frac{817}}{-32}$
it has to be a positive time

so it will hit the ground after $\frac{25+\sqrt{817}}{32}$ seconds

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3 years ago

There are 30boys in a sporting club 20of them play hockey and 15 play volley ball each boy plays atleast one of the true game.il

Fed [463]

5 boys play both hockey and volleyball (30-20-15=5)

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3 years ago

5. Use the vertical method to multiply two trinomials.

Gekata [30.6K]

Answer:

20x^4 - 13x^3 + 8x^2- x + 6

Step-by-step explanation:

box method :)

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2 years ago

The base of a circular fence with radius 10 m is given by x = 10cos(t), y = 10sin(t). the height of the fence at position (x, y)

Karo-lina-s [1.5K]

The average height of the fence is 2 m; its length is 20π m. So, its 2-sided area is
A = 2*(2 m)*(20π m) = 80π m² ≈ 251 m²

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3 years ago

The question is in the picture

faust18 [17]

Answer:

the hypotenuse is 10

Step-by-step explanation:

6^2 + 8^2 = 100

square root 100 and its 10

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3 years ago