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Mathematics

2 answers:

exis [7]3 years ago

4 0

The first one is 621 and the second one is C

Grace [21]3 years ago

4 0

(1.) Your answer is 621. The formula for the area of a rectangle is A = l*w, where l is the length and w is the width. Your length is 23 and your width is 27. So, now you have A = 23*27, which equals 621. 621 = 23*27.

(2.) First, find the area of the whole rectangle. Your length is 9 ft and your width is 8 ft. A = 9*8, which is 72. Next find the area for the play area. Your length is 4 ft and your width is 3 ft. A = 4*3, which is 12. Subtract 72-12 and you have your answer. Your answer is 60.

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B) On one rectangular coordinate system, show approximate radian values for one circle, as

sleet_krkn [62]

Answer:

(See explanation below for further details)

Step-by-step explanation:

Any point in rectangular form can be described in terms of radius and angle of the circle. That is:

$P = (r\cdot \cos \theta, r\cdot \sin \theta)$

Since circunference is divided into 8 equal parts, the point can be modelled as:

$P = (r\cdot \cos \frac{2\pi\cdot n}{8}, r \cdot \sin \frac{2\pi\cdot n}{8} )$

The approximate radian and degree values for one circle are:

Radians

$0 (0), \frac{\pi}{4} (0.785), \frac{\pi}{2} (1.571), \frac{3\pi}{4} (2.355), \pi (3.142), \frac{5\pi}{4} (3.925), \frac{3\pi}{2} (4.71), \frac{7\pi}{4} (5.495), 2\pi (6.280)$