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Schach [20]
3 years ago
6

What is the most accurate representation of the area of a plot measuring 11.7 cm by 15.4 cm?

Mathematics
1 answer:
Agata [3.3K]3 years ago
5 0
The answer is C. First, the area of the plot should be the multiplication of the two side lengths, so 11.7 * 15.4=180.18. However, we have to look at the significant digits to decide to what digit should we round the answer to. Since both 11.7 and 15.4 are accurate to the tenths digit, 180.18 should also be so, so we should round it to 180.2.
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What ordered pair corresponds to point D?
olganol [36]

Answer:

(2,0)

Step-by-step explanation:

point D is on point (2,0)

that is what it means

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3 years ago
The temperature changed from 0 degrees to +10 degrees. How much did the temperature change
Rufina [12.5K]

Answer:

it changed by 10 positive

Step-by-step explanation:

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What is the actual length of the microchip?
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8 0
3 years ago
For the function f(x)=-4sqrtx-1, find the inverse function.
d1i1m1o1n [39]

Given function: f(x)=-4\sqrt{x}-1.

We need to find the inverse of the given function f(x).

Let us write the function in terms of x and y first.

y=-4\sqrt{x}-1

Now, in order to find the inverse, we need to switch x and y, we get

x=-4\sqrt{y}-1

Now, we need to solve it for y.

In order to solve it for y, we need to isolate it for y.

Adding 1 on both sides, we get

x+1=-4\sqrt{y}-1+1

x+1=-4\sqrt{y}

Dividing both sides by -4, we get

\frac{x+1}{-4}=\sqrt{y}

In order to get rid square root from right side, we need to square both side.

(\frac{x+1}{-4})^2=(\sqrt{y})^2

\frac{(x+1)^2}{16}=y

Or y=\frac{1}{16}(x+1)^2

Therefore, inverse function is

f^{-1}(x)=\frac{1}{16}(x+1)^2.


4 0
3 years ago
Just need 37-45 answered
Julli [10]
Problem 37)

Secant angle = [(big arc) - (small arc)]/2
30 = (x - 70)/2
2*30 = 2*(x - 70)/2
60 = x-70
60+70 = x-70+70
130 = x
x = 130

---------------------------------------

Problem 38)

I'm assuming that is an 8 next to the y? Let me know if that assumption is correct or not. Thanks.

10^2 = (y+8)*8
100 = 8y+64
100-64 = 8y+64-64
36 = 8y
8y = 36
8y/8 = 36/8
y = 4.5

---------------------------------------

Problem 39)

SA = 2*pi*r^2+2*pi*r*h
SA = 2*pi*8^2+2*pi*8*25
SA = 128pi+400pi
SA = 528pi
SA = 1658.76092109541
SA = 1658.76

The surface area is approximately 1658.76 square inches

---------------------------------------

Problem 40)

I'm not exactly sure with this one. I don't see any connection forming so I don't see how you can use the law of detachment or the law of syllogism at all. Therefore I'm thinking that no valid conclusion can be drawn. 

---------------------------------------

Problem 41)

This is using the substitution property. AC is being substituted, or replaced, with BD

---------------------------------------

Problem 42)

Arc EF = arc BD, so chord BD is congruent to chord EF.

---------------------------------------

Problem 43)

AC is a perpendicular bisector to BD. So BD is cut exactly in half where BG = GD

GD = (1/2)*BD
GD = (1/2)*26
GD = 13 units

---------------------------------------

Problem 44)

Let x be the unknown angle

"its measure is 4 times the measure of its complement" translates to this equation

x = 4*(90 - x)

Solve for x
x = 4*(90 - x)
x = 360 - 4x
5x = 360
x = 360/5
x = 72

So the original angle is 72 degrees

---------------------------------------

Problem 45)

Reflecting over the x axis has you change any positive y coordinate to a negative y coordinate (or vice versa). So we have

A(0,4) ----> A'(0,-4)
B(5,0) ----> B'(5,0)
C(7,5) ----> C'(7,-5)

The two triangle has vertices at A'(0,-4), B'(5,0) and C'(7,-5)
4 0
3 years ago
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