Part A Paul wrote the equation t=2m+40t=2m+40 to represent the temperature, t, in degrees Celsius, after a substance had been heated for mm minutes.
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​Describe the relationship between the temperature of the substance and the time the substance has been heated.

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​Select from the drop-down menus to correctly complete each statement.

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​The temperature was initially 40 degree(s) Celsius. The temperature increased by
2 degree(s) ​Celsius every minute(s) it was heated.

Fill in the blanks-

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answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.

$320 to $405

step by step explanation:

in one day he earns between $64 and $81

therefore if he works for 5 days, he will earn between 64 x 5 to 81 x 5

= $320 to $405