Please hellpppp meeeee I neeedddd it asap please please

Mathematics

1 answer:

Aleks04 [339]3 years ago

3 0

5): Rectangular Flowerbed

Total Area:

14m * 10m

140m^2

Flower Bed Area:

10m * 6m

60m^2

Area of Path:

140m^2 - 60m^2

Answer ======> 80m^2

4): Area of Parallelogram: 4.5m^2

Area = B * H =====> 2.5m * 1.8 ====> 4.5m^2

b Base of the parallelogram ====> 2.5m

h Height of the parallelogram ======> 1.8m

Answer ======> Area ======> 4.5m^2

Hope that helps!!!! Numbers 5 and 4 is done for you!!!!

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4. The reflecting dish of a parabolic microphone has a cross-section in the shape of a parabola. The microphone itself is placed

elixir [45]

Assume the parabola is placed on a graph where the x-axis is the top of the dish.
The vertex is then at (0,-30) The x-intercepts or zeros are at (-30,0) and (30,0)

The equation of such parabola would be:
$y = a(x+30)(x-30)$
Plug in vertex to find value of 'a'
$-30 = a(0+30)(0-30) \\ \\ a = \frac{-30}{(-30)(30)} = \frac{1}{30}$

Now find the focus given that $p = \frac{1}{4a}$
$p = \frac{1}{4(1/30)} = \frac{30}{4} = 7.5$

Answer: the microphone should be placed 7.5 inches from vertex.

8 0

3 years ago

The record for the most rolls of wrapping paper sold for the school fundraiser is 593. Let w be the number of rolls of wrapping

astra-53 [7]

Answer:

w ≤ 593

Step-by-step explanation:

Missing option;

w ≥ 593

w > 593

w ≤ 593

593 < w