A scientist used a laboratory model to test the effect of radiation, or the sun, in heating land and water on Earth. To do this
experiment, 200 mL of water and dry sand were placed in to 2 separate 250-ml beakers. Each beaker was then placed under the
same lamp. Temperature readings were taken of each substance every 2 minutes for 8 minutes.
Use the data table to answer the following questions.
Starting Temp (°C)
2 min
4 min
6 min
8 min
Substance Heated
Water
Dry Sand
18.5
19.5
21
22
3333333333 18333333333333333320
24
26
Is this a controlled experiment? Explain.
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9.9 years

a = p(1 + rt) . . account balance after time t at rate r starting with principal p

3000 = 2500(1 + 0.0202t) . . filling in the given numbers

1.2 = 1 + 0.0202t . . divide by 2500

0.2 = 0.0202t . . . subtract 1

0.2/0.0202 = t ≈ 9.901

it will take about 9.9 years for the account balance to reach $3000.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.