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Vlada [557]
3 years ago
12

PLEASE HELP ME THIS IS DUE IN 10 MINUTES

Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
7 0

Answer:

C and D. You're welcome :)

Step-by-step explanation:

Anuta_ua [19.1K]3 years ago
6 0

Answer:

i think it is A, B, and D

Step-by-step explanation:

hope this helped!

p.s it would be cool if you gave me brainliest.

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The feet of a commemorative parabolic steel arch 100m high are 200m apart. Determine whether the focus of the arch is above or b
Neko [114]
<span>First of all, there should be coherence for the units of measurement -- either they are all meters or they are all ft. I would assume they are all ft. The correct answer is 75 ft above. T The explanation is the following: suppose the ground level is the x-axis, the 2 feet of the arch lie respectively on (0,0) and (100,0) on the ground level. Since the arch is 100ft high, the vertex of the parabola will be the point (100,100). Thus, we can find the equation describing the parabola by putting the three points we know in a system and we find that the equation of the parabola is y=(-1/100)x^2+2 To find the focus F, we apply the formula for the focus of a vertical axis parabola, i.e. F(-b/2a;(1-b^2+4ac)/4a). By substituting a=-1/100, b=2 and c=0 into the formula, we find that the coordinates of the focus F are (100,75). So we conclude that the focus lies 75ft above ground.</span>
7 0
3 years ago
Read 2 more answers
The total bill for a dinner, before tax, is $40.00. If you leave a 15% tip, you will leave a tip of
VMariaS [17]

The answer is 6$ because 50% of 40 would be 20 and 50% of 20 is 10 but when you all on the tax which would be around a dollar when you take 50% of 10 which is 5 and add on the tax which is a dollar you then get 6$ in total.

7 0
3 years ago
Write the ratio for cosB
natima [27]

Answer:

11/61

Step-by-step explanation:

cos b = adj side/hypotenuse

=11/61

4 0
2 years ago
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What is the solution to the equation below? round your answer to two decimal places. 3•7^x=10.48
Viefleur [7K]

Answer:

0.64

Step-by-step explanation:

3 0
3 years ago
If you bent length 44 cm is bent into a circle find the radius of the circle?If the same wire is bent into the shape of a square
Tju [1.3M]

Answer:

r = 7 cm; l = 11cm

The circle encloses more area than the square

Step-by-step explanation:

(a) Radius of circle

The formula for the circumference of a circle is

A = 2πr

r = A/(2π)

Data:

C = 44 in

Calculation:

r = 44/(2 × 22/7)

   = 44/2 × 7/22

   =   2/2 × 7

   = 7 in

(b) Side of square

P = 4l

l =   P/4

  = 44/4

  = 11 in

(c) Areas

(i) Circle

A = πr²

  = 22/7 ×   7²

  = 22/7 × 49

  = 22    ×   7

  = 154 cm²

(ii) Square

A = l²

  = 11²

  = 121 cm²

The circle encloses more area than the square.

5 0
3 years ago
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