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3 years ago

A submarine started at sea level and was 400 meters below sea level in 10 minutes.

Mathematics

1 answer:

ladessa [460]3 years ago

3 0

Because it is BELOW sea level after 10 minutes, it straight away cannot be A) or B), because ascended means going up, so it has to be either C) or D).

I believe the answer is C), as the answer for D) would be -40 meters per minute, but it's still 40. I'm not sure though, so it's either C) or D).

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Find an equation for the nth term of a geometric sequence where the second and fifth terms are -2 and 16, respectively.

Tju [1.3M]

Hello :
the nth term of a geometric sequence is :
Un = Up ×r^(n-p) . r is the common ratio
for : p=5 and n= 2
U5 = U2 ×r^3
16 = -2 r^3
r^3 = -8
but : -8 = (-2)^3
so : r = -2
Un = U2 × r^(n-2)
Un = -2 ×(-2)^(n-2)= (-2)^(n-2+1)

the nth term of a geometric sequenceis : Un = (-2)^(n-1)

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balu736 [363]

Answer:

Option A. one rectangle and two triangles

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Step-by-step explanation:

step 1

we know that

The area of the polygon can be decomposed into one rectangle and two triangles

see the attached figure N 1

therefore

Te area of the composite figure is equal to the area of one rectangle plus the area of two triangles

$A=(8)(4)+2[\frac{1}{2}((8)(4)]=32+32=64\ yd^2$

step 2

we know that

The area of the polygon can be decomposed into one triangle and one trapezoid

see the attached figure N 2

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olga55 [171]

Answer:

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Step-by-step explanation:

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The answer would be D.

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