PSAT #1

The half-life of caffeine in the human body is 5 hours. If Rafe drinks a cup of coffee at 7:00 a.m., what percentage of the caffeine is still in his system at 12:00 p.m.?

• 40%

• 50%

• 25%

• 60%

Tags

CCSS.HSF.BF.A.1

CCSS.HSF.BF.B.5

CCSS.HSF.LE.A.1

CCSS.HSF.LE.A.2

CCSS.HSF.LE.A.4

• -2 ≤ x ≤ 8

• -17 ≤ x ≤ 23

• x ≤ -17 or x ≥ 23

• x ≤ -2 or x ≥ 8

• 4

• -1/2

• -2

• -8

Tags

CCSS.6.EE.A.2C

• 3x⁴ - 16x³ + 5x² - 6x + 30

• 3x⁴ - 15x³ - 5x² - 6x - 30

• 3x⁴ - 5x³ + 5x² + 6x - 30

• 3x⁴ + 16x³ - 5x² - 6x + 30

Tags

CCSS.HSA.APR.A.1

The figure shows the shape of a large swimming pool in a Las Vegas resort. The pool is a rectangle with semicircles on either end. If the pool is 8 feet deep throughout, what is the volume of the pool in cubic feet. rounded to the nearest whole number? Use 3.14 for π

Mathematical Equivalence

ON

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

• x=10

• x=11

• x=12

• x=13

Tags

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.3

Mathematical Equivalence

ON

Tags

CCSS.HSA-REI.B.4B

Mathematical Equivalence

ON

Tags

CCSS.HSG.CO.C.11