Radioactive decay of 40k in an igneous rock has resulted in a ratio of 25 percent 40k atoms to 75 percent of 40ar and 40ca atoms. How many years old is this rock?

Who is the cranky old woman who yells at Jem and Scout? - miss maudie - miss caroline - mrs. dubose - ms. lee

With the intake of alcoholic beverages, damage to you pancreas can include inflammation, atrophy and fibrosis. True of false?

Enter the word that best completes the sentence. Word Bank groom employ grave check reign park When did your cousins go hiking in the state?

Define the independent and dependent variable: A researcher was interested in finding out whether talking to plants was related to plant growth. To test this idea she used 20 plants where all 20 plants had the same amount of food, water and sunlight.

Which shows the use of the associative property? 7 n + one-fifth = one-fifth + 7 n 7 + (one-fifth + n) = (7 + one-fifth) + n 7 (n + one-fifth) = 7 n + StartFraction 7 Over 5 EndFraction (7 + one-fifth) + n = 7 and one-fifth + n

Which instrument sends back radio signals to Earth about temperature at various heights in the atmosphere? A. weather balloon B. radar C. sunscope D. barometer

Why is Splitting a thick log so hard?

If a person's body has a density of 995 kg/m³, what fraction of the body will be submerged when floating gently in (a) freshwater? (b) In salt water with a density of 1027 kg/m³?

What's the difference between the approaches of Nancy Bayley and Emmi Pikler when it comes to evaluating babies' development? A.

Evaluate each expression for a = 9, b = - 3, c = - 2, d = 7. Showyour work. 1. A - cd2. 2b3 + c2a+d-cb4. (a-b) 2 + d (a + c) 5. 4c - (b - a) ab-5a7. 2bc + d (12 - 5) 8. B + 0.5[8 - (2c + a) ]Simplify each expression using the Distributive Property.