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Rashid [163]
4 years ago
6

The odometer of the family car shows 15,951 miles. The driver noticed that this number is palindromic: it reads the same backwar

d as forward. “Curious,” the driver said to himself. “It will be a long time before that happens again.” But 2 hours later, the odometer showed a new palindromic number. How fast was the car traveling in those 2 hours?
Mathematics
1 answer:
ludmilkaskok [199]4 years ago
5 0
The next palindromic number is 16061, so he traveled 110 miles. 110 miles/2 hours = 55 mph.
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What is the value of X and y?
qaws [65]

Answer:

Therefore, the first number in an ordered pair is a value for x, and the second number is a value for y. These numbers are called the x- and y-coordinates.Jan 6, 2020

Step-by-step explanation:

Therefore, the first number in an ordered pair is a value for x, and the second number is a value for y. These numbers are called the x- and y-coordinates.Jan 6, 2020

7 0
3 years ago
Read 2 more answers
(a) Use the reduction formula to show that integral from 0 to pi/2 of sin(x)^ndx is (n-1)/n * integral from 0 to pi/2 of sin(x)^
Sedbober [7]
Hello,

a)
I= \int\limits^{ \frac{\pi}{2} }_0 {sin^n(x)} \, dx = \int\limits^{ \frac{\pi}{2} }_0 {sin(x)*sin^{n-1}(x)} \, dx \\

= [-cos(x)*sin^{n-1}(x)]_0^ \frac{\pi}{2}+(n-1)*\int\limits^{ \frac{\pi}{2} }_0 {cos(x)*sin^{n-2}(x)*cos(x)} \, dx \\

=0 + (n-1)*\int\limits^{ \frac{\pi}{2} }_0 {cos^2(x)*sin^{n-2}(x)} \, dx \\

= (n-1)*\int\limits^{ \frac{\pi}{2} }_0 {(1-sin^2(x))*sin^{n-2}(x)} \, dx \\
= (n-1)*\int\limits^{ \frac{\pi}{2} }_0 {sin^{n-2}(x)} \, dx - (n-1)*\int\limits^{ \frac{\pi}{2} }_0 {sin^n(x) \, dx\\


I(1+n-1)= (n-1)*\int\limits^{ \frac{\pi}{2} }_0 {sin^{n-2}(x)} \, dx \\
I= \dfrac{n-1}{n} *\int\limits^{ \frac{\pi}{2} }_0 {sin^{n-2}(x)} \, dx \\


b)
\int\limits^{ \frac{\pi}{2} }_0 {sin^{3}(x)} \, dx \\
= \frac{2}{3} \int\limits^{ \frac{\pi}{2} }_0 {sin(x)} \, dx \\
= \dfrac{2}{3}\ [-cos(x)]_0^{\frac{\pi}{2}}=\dfrac{2}{3} \\






\int\limits^{ \frac{\pi}{2} }_0 {sin^{5}(x)} \, dx \\
= \dfrac{4}{5}*\dfrac{2}{3} \int\limits^{ \frac{\pi}{2} }_0 {sin(x)} \, dx = \dfrac{8}{15}\\







c)

I_n=  \dfrac{n-1}{n} * I_{n-2} \\

I_{2n+1}=  \dfrac{2n+1-1}{2n+1} * I_{2n+1-2} \\
= \dfrac{2n}{2n+1} * I_{2n-1} \\
= \dfrac{(2n)*(2n-2)}{(2n+1)(2n-1)} * I_{2n-3} \\
= \dfrac{(2n)*(2n-2)*...*2}{(2n+1)(2n-1)*...*3} * I_{1} \\\\

I_1=1\\






3 0
4 years ago
Trey is putting up fence around a 750 foot by 540 foot lot. How many feet of fence does he need?
muminat

Answer:

2580 feet

Step-by-step explanation:

The question is essentially asking for the perimeter.

Considering the lot is  a parallelogram at the least, it would be (750+540)*2, or 1290*2, or 2580

4 0
3 years ago
If the area is 48 cm and the radius is of the circle is 4 cm then what is the central angle
Digiron [165]

Answer:

Step-by-step explanation:

Area of sector = (∅/360°) x πr²

Area of sector = 48cm²

radius = 4cm

π = 3.14

48 =  (∅/360°) x 3.14 x 4 x4

48 = (∅/360°)  x 50.24

48/50.24 =(∅/360°)

0.9554  = (∅/360°)

∅ = 0.9554 x 360 = 343.949≈343.95° ( these is when the angle is in degrees)

if it is radians

area of sector = 1/2r²∅

area of sector = 48

r = radius = 4

area of sector = 1/2r²∅

48 = 1/2 x 4 x4 x∅

48 = 2x4 x∅

48 = 8∅

∅ = 48/8 = 6 radians

the central angle in radians is 6

4 0
3 years ago
Read 2 more answers
Given g (x) = -2x-2 find g (1)
Firdavs [7]
To get the answer, all you have to do is plug in 1 into the equation.

So, it would be -2(1) - 2 -> -2 -2 -> -4
The answer is -4
Hope this helps!
3 0
3 years ago
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