Question Completion Status: QUESTION 18 Consider the following statement. Identify the variables correlated and express the correlation as either positive or negative. In the summertime, the lower the day - high temperature, the lower the sales of watermelon smoothies The variables are and day-high temperature; sales of watermelon smoothies day-high temperature; sales of watermelons O season of the year; number of watermelon smoothies sold season of the year; sales of frozen yogurt QUESTION 19 Consider the following statement. Express the correlation as either positive or negative. In the summertime, the lower the day - high temperature, the lower the sales of watermelon smoothies The correlation is In the summertime, the lower the day - high temperature, the lower the sales of watermelon smoothies The correlation is QUESTION 20 lodine 131 is used in medicine for diagnosis and treatment. A small quantity gets injected into a patient before an x-ray. Then over a period of several days it gets metabolized until no more remains. The half-life of lodine 131 is 8 days. Suppose that a patient gets injected with 120 mg of lodine-131. how much is present after 20 days? (1/T hall) Set up: New value = initial value x * ( ) Timers Step 1: Write the given numeric values. Please do not enter any units and hit the TAB key to move to the next field. t. Thalf" initial value = QUESTION 21 Use the answer to the previous question for this question. Click Save and Submit to save and submit. Click Save All Answers to save all answers, Save Al ay.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_146 Translate News M Gmail Login with Google... Remaining Time: 1 hour, 17 minutes, 34 seconds. Question Completion Status: QUESTION 21 Use the answer to the previous question for this question. lodine-131 is used in medicine for diagnosis and treatment. A small quantity gets injected into a patient before an x-ray. Then over a period of several days it gets metabolized until no more remains. The half-life of lodine. 131 is 8 days. Suppose that a patient gets injected with 120 mg of lodine-131. How much is present after 20 days? Set up: New value = initial value x (1)" ! Two Step 2: Compute the decay factor. Enter the numeric decimal value rounded off to the nearest thousandth (3 decimal places). The decay factor is QUESTION 22