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bezimeni [28]
3 years ago
9

What is the circumference of a. Ircle of a radius 7cm

Mathematics
1 answer:
adoni [48]3 years ago
7 0
The circumference of a circle of a radius of 7cm would be ≈43.98cm
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A store gives a customer 20% off if $10 or more amount of product is purchased. Otherwise the customer pays the usual price at c
Nadya [2.5K]

Answer:

The expected payment by the customer at the checkout is $9.

Step-by-step explanation:

The amount of the product is given as

f(x)=\left \{ {{\frac{50}{x^3}       \,\,\,\,\, x\geq 5 } \atop {0}} \right.

Now the expected payment is given as

EP=\int\limits^{10}_{5} {x f(x)} \, dx +\int\limits^{\infty}_{10} {0.8x f(x)} \, dx

Here 0.8 x is used in the second integral because of the discount of 20% i.e. the expected price is 80% of the value such that

\\EP=\int\limits^{10}_{5} {x \frac{50}{x^3}} \, dx +\int\limits^{\infty}_{10} {0.8x \frac{50}{x^3}} \, dx\\\\EP=\int\limits^{10}_{5} {\frac{50}{x^2}} \, dx +\int\limits^{\infty}_{10} {\frac{40}{x^2}} \, dx\\EP=[\frac{50}{-x}]_5^{10} +[\frac{40}{-x}]_{10}^{\infty} \\EP=[\frac{-50}{10}+\frac{50}{5}] +[\frac{-40}{\infty}+\frac{40}{10}]\\\\EP=-5+10+0+4\\EP=9

The expected payment by the customer at the checkout is $9.

8 0
3 years ago
Answer for points
givi [52]
B=area of the base and 12cm
H=height and 9cm
Volume= 216cm
7 0
2 years ago
Read 2 more answers
A rectangle is a _____.<br><br> a. quadrilateral<br> b. square<br> c. parallelogram<br> d. rhombus
Pavlova-9 [17]
Both A and C is true. However, even though a rectangle can be a parallelogram, a parallelogram is a quadrilateral, so the answer is A.
I hope this helps!
8 0
3 years ago
Natalie made two statues of a giraffe the first measures 16 feet tall and the second measures 6 inches tall what is the differen
laiz [17]
First you would have to convert , so 12 inches = 1 foot . So do 12 X 16= 192inches, then subtract 192-6=186inches should be the difference IN INCHES. If you need it in feet divide 186 by 12 which should give you 15.5feet
8 0
3 years ago
Use Julia’s work and finish finding the areas of the faces what is the surface area of the rectangular pyramid
hoa [83]

Answer:

The surface area of the rectangular pyramid is SA=109.50\ m^{2}

Step-by-step explanation:

we know that

The surface area of the rectangular prism is equal to the area of the rectangular base plus the area of the four triangular faces

so

SA=(8)(5)+2[14.75]+2[\frac{1}{2}(8)(5)]

SA=40+29.50+40

SA=109.50\ m^{2}

6 0
3 years ago
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