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4 years ago

Write 0.87 as a fraction

Mathematics

1 answer:

Klio2033 [76]4 years ago

7 0

isnt it 87/100 as a fraction?

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I have attached the question below

aniked [119]

$\text{The perimeter of the semicircle} = \text{radius}(\pi+2)=3(\pi+2)~cm=(3\pi + 6) ~cm\\$

4 0

2 years ago

Estimate 1 13 cos(x2) dx 0 using the Trapezoidal Rule and the Midpoint Rule, each with n = 4. (Round your answers to six decimal

babunello [35]

Answer:

(a) 4.152698

(b) 3.215557

Step-by-step explanation:

(a)

$\int\limits^{13}_1 {cos(x^2)} \, dx =M_n=$\sum_{n=1}^{\infty} f(m_i)\Delta x $$

n=4, so :

Each subinterval has length :

$\Delta x= \frac{b-a}{n} =\frac{13-1}{4} =\frac{12}{4} =3$

Therefore the subintervals consist of:

$[1,5], [5,9], [9,13]$

Now, the midpoints of these subintervals are:

$\frac{1+5}{2} =3\\\\\frac{5+9}{2} =7\\\\\frac{9+13}{2} =11$

Hence:

$M_4= 3*(cos(3^2))+3*(cos(7^2))+3*cos((11^2))\approx 4.152698$

(b)

$\int\limits^{13}_1 {cos(x^2)} \, dx =T_n=\frac{\Delta x}{2} (f(x_o)+2f(x_1)+2f(x_2)+...+2f(x_n_-_1)+f(x_n))$

n=4, so :

Each subinterval has length :

$\Delta x= \frac{b-a}{n} =\frac{13-1}{4} =\frac{12}{4} =3$

Therefore the subintervals consist of:

[1,5], [5,9], [9,13]

The endpoints of the subintervals consist of:

5,9

Hence:

$T_4= \frac{3}{2}(cos(1^2)+2*cos(5^2)+2*cos(9^2)+cos(13^2)) \approx 3.215557$

8 0

3 years ago

Round 855.788 to the nearest tenth

kykrilka [37]

Answer:

855.8

Step-by-step explanation:

hundreds tens ones . tenths hundredths thousandths

8 5 5 . 7 8 8

We are rounding to the nearest tenth, so we look at the next number which is 8. 8>= 5 so we will round the 7 up

855.788 rounds to 855.8

4 0

4 years ago

Help please! - "Enter The Equation of the line in the form y= mx where m is the slope."

Dmitry [639]

Answer:

y = 1/2x

Step-by-step explanation:

Choose two points- I chose (10,5) and (0,0)

Find the slope using y2-y1/x2-x1

Use y - y1 = slope (x -x1) to get your equation

The answer should be y =1/2x

Hopefully this helps- let me know if you have any questions

5 0

3 years ago

Need help ASAP!! WILL give Brainly!!! Need the full equation!! THANK YOU!!

vekshin1

Answer:

$y = - \frac{6}{8}x - 3$

8 0

3 years ago