The height of a stack of DVD cases is in a proportional relationship to the number of cases in the stack. A stack of 8 cases and its height are shown. Find the constant of proportionality. Then use the constant of proportionality to find the height of a stack of 14 cases.

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Step-by-step explanation:

The question is not complete.

The height of a stack of DVD cases is in a proportional relationship to the number of cases in the stack. A stack of 6 cases and its height are shown.

The height of 6 DVD cases is 114 mm

a. What is the constant of proportionality in millimeters per DVD case?

b. What is the height of 13 DVD cases in millimeters?

Solution:

a) The height of the stack of DVD is proportional to the number of cases. Let y represent the height of the stack and x represent the number of cases. Since y ∝ x, therefore:

y = kx  (where k is the constant of proportionality)

When y = 114 mm, x =6, substituting:

114 = 6k

k = 114/6

k = 19

b) The equation now becomes:

y = 19x

For 13 cases, (x = 13) the height is:

y = 19(13)

y = 247 mm

For 13 cases, the height is 247 mm

answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation: