Answer:
2.5 seconds.
Step-by-step explanation:
Find the value of t when the height is 28 feet:
-16t^2 + 56t + 4 = 28
-16t^2 + 56t - 24 = 0
-8(2t^2 - 7t + 3) = 0
-8(2t - 1)(t - 3) = 0
t = 0.5, 3 seconds.
So on the upward journey the rock is at 28 feet at 0.5 second after the throw and at 3 seconds it is at 28 feet again while it is falling back.
Therefore the period when it is at least 28 feet above the ground is 3.0 - 0.5 = 2.5 seconds.
Answer:
19
Step-by-step explanation:
10 x 19 = 190
190 divided by 2 = 95
95 x 12 = 1140
Answer:
Option 1 and 3 are continuous graph.
Step-by-step explanation:
We have been given the four graphs we need to tell which one among these given graphs is continuous
Option 1 is continuous since, there is no break in the graph and points are joint that is a straight line.
Option 2 is discrete graph it is not continuous because these are points which are not joint.
Option 3 is continuous since, there is no break in the graph and points are joint that is a straight line.
Option 4 Option 2 is discrete graph it is not continuous because these are points which are not joint.
Answer:
113
Step-by-step explanation:
area of a circle is 3.14*r^2
r=d/2 r=6
3.14*36=113
Answer:
h = 2.7 m
Step-by-step explanation:
ΔADE and ΔABC are similar, hence ratios of corresponding sides are equal
DE / BC = AD / AB, that is
h / 0.9 = 18 / 6 ( cross- multiply )
6h = 16.2 ( divide both sides by 6 )
h = 2.7
