Joe buys a polythene tunnel to protect his plants from frost. It has a semicircular cross section with a diameter of 70cm and a length of 3m.A) find the cross sectional area in m^2

Answers

Answer 1

Answer: Sorry I really don’t no amber it is 21

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For the graph below, what should the domain be so that the function is at least 600? (1 point)graph of y equals minus 2 times the square of x plus 40 times x plus 600

0 ≤ x ≤ 20
−10 ≤ x ≤ 30
x ≥ 0
All real numbers

Answers

Answer: The first interval:0 ≤ x ≤ 20

Procedure

You have to solve this inequality

-2x^2 +40x +600 ≥ 600

-2x^2 +40x ≥ 0

-x^2+20x ≥ 0

x^2 - 20 x ≤ 0

x(x-20) ≤ 0

That is only possible if the two factors have different signs.

Let's examine the possibilities

x ≥ 0 and x -20 ≤ 0⇔x≤20, that is 0≤x≤20

The other possibility is

x ≤ 0 and x - 20 ≥ 0 ⇔x≥20. This conditions is not possible.

So the solution is 0≤x≤20

How does -1 to the 6th power equal -1? shouldn't it be positive?

Answers

$(-1)^6=1\n-1^6=-1$

What is the exact volume of a cylinder whose radius is 21 centimeters and whose height is 30 centimeters?answer in terms of pie

Answers

volume of cylinder
v = πr²
v = 22/7 x 21²
v = 1385.441 cm³

Which fraction (in simplest form) is equivalent to 0.42?A.42/100
B.10/42
C.1/2
D.21/50

Answers

If you would like to know which fraction (in simplest form) is equivalent to 0.42, you can find this using the following steps:

0.42 = 42/100 = 21/50

The correct result would be D. 21/50.

Answer:

Step-by-step explanation:

If x=at^3 and y=bt^2 then find dy/dx

Answers

dy/dx = (dy/dt) / (dx/dt)

dy/dt = 2bt

dx/dt = 3at^2

therefore dy/dx = 2bt/3at^2
dy/dx = 2b/3at

Expand the following by using binomial theorem.
I) (7x-4y)⁵

Answers

(7x-4y)+( 7x-4y)+(7x-4y)+

(7x-4y)+(7x-4y)

Other Questions

The triangles shown are congruent which of the following must be true

If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (g – f)(3)?

Please help me to answer this question thank you otherwise I my teacher will be so mad .

Can someone answer please? i will give brain-list