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Rufina [12.5K]
3 years ago
13

Name each activity or observation as either physical or chemical change.

Chemistry
1 answer:
OLga [1]3 years ago
8 0
<span>1) Boiling water for pasta-> physical
2) Digesting food -> chemical
3) Soda goes "flat" -> physical
4) Stretching a rubber band -> physical
5) Grilling a hamburger -> chemical
6) Adding sugar to tea -> physical
7) Adding lemon to tea -> physical
8) Mowing the grass -> physical
9) The smell of perfume "wafts" across the room -> physical
10) Candle wax melts -> physical
11) Breaking glass-> physical
12) Making cement-> chemical
13) Lighting a match-> chemical
14) Water is absorbed by a paper towel-> physical
15) Firefly glows in the dark-> chemical
16) Snow melts-> physical
17) Bleaching your hair-> chemical
18) Turning on a light bulb-> physical
19) Milk goes sour-> chemical
20) Shooting off fireworks-> chemical</span>
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3 years ago
1. A cupcake show makes and delivers specialized cupcakes. It will cost someone $30 for
lorasvet [3.4K]

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2.5

Explanation:

The given costs for the purchase and delivery of the cupcakes are;

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Let 'c' represent the fixed cost of delivery of the cup cakes, and let 'x' represent the cost of each cup cake, we have;

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67.50 = 25·x + c...(2)

Subtracting equation (1) from equation (2) gives;

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∴ x = 37.50/15 = 2.5

The cost of each cupcake, x = 2.5

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The cost of each cupcake is 2.5.

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