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3 years ago

How do you get the answer for $7.85 x 0.8?

2 answers:

3 0

You can divide the 7.85 by 5 and then times it by 4 to get the final answer:
7.85/5 = 1.57
1.57*4 = 6.28

The answer is $6.28,
Hope this helps! :)

NemiM [27]3 years ago

3 0

You can divide $7.85 by 5 then you times it by 4 to get your final answer
7.85/5= 1.57
1.57*4= 6.28
Hope this helps

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What is the volume of the rectangular prism?

LenKa [72]

Answer
200
Explanation
Base length (8) x base width (2)= 16
Then, the area of the base(16) x the height of the prism(12.5 or 12 1/2) = 200

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3 years ago

Value for X^2 left for 95% confidence interval when n=18

tatuchka [14]

Given that n = 18, then the degree of freedom is n - 1 = 17.

From the table of Chi Square $(X^2)$

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3 years ago

Two men p and q set off from a base camp r prospecting for o,p moves 40km on a bearing 205 degree and q moves 30km on a bearing

Mkey [24]

Answer:

(a) By cosine rule, /PQ/2=202+152−2×20×15×cos145°

= 400+225−600cos145°

= 625+600×0.8192

= 491.52+625

/PQ/2=1116.52⟹/PQ/=1116.52−−−−−−√=33.41

≊33km ( to the nearest whole number)

(b) By sine rule,

sin<QPR15=sin14533.41

sin<QPR=15sin14533.41

sin<QPR=15×0.573633.41=0.2575

<QPR=14.92°

∴ Bearing of Q from P = 25° + 14.92° = 39.92°.

≊40° (to nearest whole number)

Step-by-step explanation:

hope it helps

...

6 0

3 years ago

Show that ( 2xy4 + 1/ (x + y2) ) dx + ( 4x2 y3 + 2y/ (x + y2) ) dy = 0 is exact, and find the solution. Find c if y(1) = 2.

fredd [130]

$\dfrac{\partial\left(2xy^4+\frac1{x+y^2}\right)}{\partial y}=8xy^3-\dfrac{2y}{(x+y^2)^2}$

$\dfrac{\partial\left(4x^2y^3+\frac{2y}{x+y^2}\right)}{\partial x}=8xy^3-\dfrac{2y}{(x+y^2)^2}$

so the ODE is indeed exact and there is a solution of the form $F(x,y)=C$ . We have

$\dfrac{\partial F}{\partial x}=2xy^4+\dfrac1{x+y^2}\implies F(x,y)=x^2y^4+\ln(x+y^2)+f(y)$

$\dfrac{\partial F}{\partial y}=4x^2y^3+\dfrac{2y}{x+y^2}=4x^2y^3+\dfrac{2y}{x+y^2}+f'(y)$

$f'(y)=0\implies f(y)=C$

$\implies F(x,y)=x^2y^3+\ln(x+y^2)=C$

With $y(1)=2$ , we have

$8+\ln9=C$

$\boxed{x^2y^3+\ln(x+y^2)=8+\ln9}$

8 0

3 years ago

An item that costs $35.00 is marked 25% off. What is the final price, not including tax?

Tema [17]

Answer:

26:25

Step-by-step explanation:

7 0

2 years ago

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