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babymother [125]
3 years ago
10

1. If 50% of x is 20, what is 10% of c ? A. 4 B.16 C. 20 D.40

Mathematics
1 answer:
Elan Coil [88]3 years ago
6 0

Answer:

b???????????????????????????

Step-by-step explanation:

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Diện tích xung quanh của hình chóp tứ giác đều có cạnh bằng 6cm và độ dài trung đoạn bằng 10cm là:
Serggg [28]

Answer:

A

Step-by-step explanation:

(6.2).10=120cm²

Đáp án đó chúc bạn học tốt

5 0
3 years ago
Please Help Quickly!!!<br><br> Find the limit if f(x) = x^3
jeka94

Answer:

Option b. 12

Step-by-step explanation:

This exercise asks us to find the derivative of a function using the definition of a derivative.

Our function is f(x) = x^{3}. Therefore:

f(2+h) = (2+h)^{3}

f(2) = (2)^{3} = 8

Then:

\lim_{h \to \0} \frac{f(2+h)-f(2)}{h}=\lim_{h \to \0} \frac{(2+h)^{3}-8}{h}

Expanding:

\lim_{h \to \0} \frac{(2+h)^{3}-8}{h} =\lim_{h \to \0} \frac{8+ h^{3} +6h(2+h) -8}{h} =\lim_{h \to \0} \frac{h^{3} +6h(2+h)}{h}

\lim_{h \to \0} \frac{h^{3}+ 6h(2+h)}{h} =\lim_{h \to \0} h^{2} + 6(2+h)

Now, if x=0:

\lim_{h \to \0} \frac{f(2+h)-f(2)}{h} = (0)^{2} +6(2+0) = 12

4 0
3 years ago
In △ABD, altitude AC¯¯¯¯¯ intersects the right angle of triangle ABD at vertex A. BC=3.1 in. and CD=7.2 in..
vodomira [7]

Answer:

4.72 in.

Step-by-step explanation:

BC = 3.1 in.

CD = 7.2 in.

Altitude of right triangle altitude is given as h = \sqrt{xy}, where:

h = altitude

x = 3.1 in.

y = 7.2 in.

Plug in the values into the formula

h = \sqrt{3.1*7.2}

h = \sqrt{22.32}

h = 4.72 in. (nearest hundred)

5 0
3 years ago
Read 2 more answers
GEOMETRY HELP PLEASE URGENT
KiRa [710]

Lets O is the center of the circle and Lets A is a point cut on CD from O

mCD = m<COD

OA is perpendicular bisector of CD so OA = 1/2 CD = 1/2(12.7) = 6.35

Sin (DOA) = AD/OD = 6.35 / 9.06

Sin DOA = 0.7009

<DOA = 44.5°

<COD = 2 x 44.5°

<COD = 89°

mCD = <COD = 89°

Answer: 89°

5 0
3 years ago
Can you help me with this? I’ll mark brainliest
koban [17]

Answer:

Step-by-step explanation:

The step you need next is RQ = RQ.

When I learned this stuff, saying that RQ = RQ is the reflexive property.

Now you have

RP = RS                 Given

<PRQ = <SRQ       The result of a bisected angle.

RQ = RQ                A line is always equal to itself.

So the triangles are congruent. The rest follows as stated.

3 0
4 years ago
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