Three items were bought at a car boot sale. Item A
Mass = 42 grams
Volume = 2 cm
Item B
Mass = 87.5 grams
Volume = 5 cm
Item C
Mass = 147 grams
Volume = 7 cm
The density of platinum is approximately 21 grams per cm".
Which of the items cannot be platinum?
You must show your working.

Anull hypothesis states that the difference between 8 hours of sleep and 3 hours of sleep has no effect on the number of pictures a student will remember during a picture memory interface test (pmit). examining the mit database, an extremely small t-value of 0.1611 is found. this t-value is much smaller than the smallest t-value on the chart for p-value reference. from this information we can: select one: a. accept the null hypothesis because the p-value obtained shows that the difference between the two groups being tested is not statistically significant b. accept the null hypothesis because the p-value obtained was statistically significant c. reject the null hypothesis because of the p-value obtained d. reject the null hypothesis because the data obtained is statistically significant