A string of decorative lights is 28 ft long the first light on the string is 16 inches from the plug if the lights on the string are spaced 4 inches apart how many lights are there on the string
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To find out how many lights are on the string, we first need to calculate the length of each light, including the space between them.
Each light is spaced 4 inches apart, and the first light is 16 inches from the plug. Therefore, the distance between the plug and the second light will be 16 + 4 = 20 inches.
Now, let's convert the length of the string and the distance between the plug and the second light to the same unit. Since both are given in inches, we don't need to convert anything.
To calculate the total length of the lights, we need to subtract the distance between the plug and the second light from the total length of the string:
28 ft = 336 inches
Length of lights = Total length of the string - Distance between the plug and the second light
= 336 inches - 20 inches
= 316 inches
Each light, along with its 4-inch spacing, is equal to 4 inches + 1 light = 5 inches.
Now, to determine the number of lights on the string, divide the total length of the lights by the length of each light:
Number of lights = Total length of the lights / Length of each light
= 316 inches / 5 inches
= 63.2
Since we cannot have a fraction of a light, the number of lights on the string is 63.
Therefore, there are 63 lights on the string.
start at 12 inches, each foot then has three lights per added feet.
lights=3*(28-1) then -1 refers to the first 12 inches plug to new starting point.