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kiruha [24]
4 years ago
14

The area of a circle is less than 1 dm². Find the radius of the circle.

Mathematics
1 answer:
KATRIN_1 [288]4 years ago
4 0

Answer:

Step-by-step explanation:

pi r^2 < 1

r^2 < 1/π

r < 1/√π dm

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What is (2,7) rotated 90% clockwise
ohaa [14]

Answer:

The required point is, (7, -2)

Step-by-step explanation:

The straight  line passing through (0,0) and (2,7) is,

y = (\frac {7 -0}{2-0}) \times x

⇒ y = 3.5x --------------(1)

Now, the straight line perpendicular to this line and passing through (0, 0) is

y = (\frac {-1}{3.5}) \times x

⇒ 7y + 2x = 0 -------------(2)

Let, (h,k) be the required point.

then, it is on the line 7y + 2x = 0

⇒7k + 2h = 0

⇒k = (\frac {-2}{7}) \times h ------------(3)

Again, distance from (0,0) of (h, k) is same as that of (2,7)

⇒ h^{2} + k^{2} = 4 + 49 = 53

⇒h^{2} \times (\frac {53}{49}) = 53 [putting the value of k from (3)]

⇒h^{2} = 49

⇒h = 7 [since, (h,k) is in 4th quadrant, so,h >0]

So, k = -2 [putting the value of h in (3)]

So, the required point is, (7, -2)

5 0
3 years ago
1.
777dan777 [17]

Answer:

Solve it yourself

Step-by-step explanation:

4 0
3 years ago
A company dyes two sizes of rugs. A small rug requires 4 hours for dyeing and a medium-size rug requires 6 hours for dyeing. The
Free_Kalibri [48]

Answer:

4x + 6y > 120

Step-by-step explanation:

i got the same question on my midterm exam.

5 0
3 years ago
Simplify and expand (X+3)(x-3)(3x+3)<br>​
ivolga24 [154]

Answer:

3x^3 + 3x^2 - 27x - 27

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
A parcel delivery service will deliver a package only if the length plus girth​ (distance around) does not exceed 84 inches. ​(A
Kisachek [45]

Answer:

A. 14x14x28

B. The maximum volume is 5488 cuibic inches

Step-by-step explanation:

The problem states that the box has square ends, so you can express volume with:

v=x^{2} y

Using the restriction stated in the problem to get another equation you can substitute in the one above:

4x+y=84\\\\

Substituting <em>y</em> whit this equation gives:

v=x^{2} (84-4x)\\\\v=84x^{2} -4x^{3}

Now find the limit of <em>x</em>:

\frac{84x^{2}-4x^{3}}{dx}=168x-12x^{2}\\\\x=\frac{168}{12}=14

Find the length:

y=84-4(14)=28

You can now calculate the maximum volume:

v=(14)^{2}(28)= 5488

6 0
3 years ago
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