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3 years ago

308 miles in 7 hours. Find the

Mathematics

1 answer:

Ronch [10]3 years ago

4 0

Answer:

They did 44 miles per hour

Step-by-step explanation:

308 / 7 = 44

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What is the dot product of vectors aand bif a=3i+ -2j–7kand b=10i-4j-2k?

meriva

A•b = (3×10) + (-2×-4) + (-7×-2) = 30 + 8 + 14 = 52

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3 years ago

A cube has 4 inch edges what is its volume

denis23 [38]

64 inches. 4*4*4=64. You take all the sides and multiply them together. Hope this is what u we're looking for

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3 years ago

^9 belongs to what family of real numbers?

Setler79 [48]

Answer:

Rational number

Step-by-step explanation:

Rational numbers repeat and terminate. The square root of 9 is 3, and 3 is a whole number as well as a number that terminates, which makes it a rational number

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3 years ago

The volume of a cylinder is 400x cm. The radius of the base of the cylinder is 4 cm. What is the height of the cylinder

irina1246 [14]

Answer: 8cm

Step-by-step explanation:

$V=\pi r^2h$

Solve for h;

$h=\frac{V}{\pi r^2}$

$h=\frac{400cm^3}{(3.14)(4cm)^2}$

$h=7.96\\h=8$

3 0

3 years ago

Help find the missing lengths round to nearest tenth

Mama L [17]

Answer:

Step-by-step explanation:

Theta is 21 degrees

x is the adjacent side
8 is the opposite side
y is the hypothenuse

SOH - CAH - TOA

Since the opposite side is given and we need to find the length of the adjacent side, we can use tangent to solve for x.

$tan 21=\frac{opposite}{adjacent} \\tan 21 =\frac{8}{x} \\0.384 =\frac{8}{x} \\0.384x =8 \\x=\frac{8}{0.384} \\x=20.84$

Since the opposite side is given and we need to find the length of the hypotenuse, we can use sine to solve for y.

$sin 21=\frac{opposite}{hypotenuse} \\sin21 =\frac{8}{y} \\0.358 =\frac{8}{y} \\0.358y=8 \\y=\frac{8}{0.358} \\y=22.32$

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3 years ago