S(t) = 3.82 - 0.2t
Step-by-step explanation:
After 7 weeks, the ice is 2.42 meters thick. The ice loses 0.2 meters of thickness per week; this means on the 7th week, it has lost 7(0.2) = 1.4 meters of thickness.
This means the ice started at 2.42+1.4 = 3.82 meters thick.
Our function will start at the original thickness of the ice, 3.82 meters.
Since the ice is losing thickness, we will subtract; it loses at a rate of 0.2 meters per week (t), which gives us 0.2t. This is subtracted from the original, 3.82 meters, giving us
S(t) = 3.82 - 0.2t
Answer: 6 kids walked to school
Step-by-step explanation:
Since there are 13 kids altogether and 7 rode the bus, it can be solved using subtraction.
13 - 7 = 6
Answer:
give a little more explanation.
Step-by-step explanation:
Answer:
The top of the ladder is 6.3 feet high from the ground.
Step-by-step explanation:
The given question can be expressed by the three sides of a right angled triangle. Let the height of the top of the ladder from the ground be represented by h.
Thus, applying the Pythagoras theorem to determine h, we have;
= 
+ 
= 
+ 
121 = + 81
= 121 - 81
= 40
h = 
= 6.325
h = 6.325 feet
The top of the ladder is 6.3 feet high from the ground.
Answer:
3,410,880 ways.
Step-by-step explanation:
There are no markings to differentiate the position so the order is not important. The group also divided into day and night workers which independent from each other.
You want to make a schedule for 5 day workers out of 20 day workers, the number of ways to do that will be: 5C20= 20!/5!15! =15504 ways
You want to make a schedule for 3 night workers out of 12 night workers, the number of ways to do that will be: 3C12= 12!/3!9! =220 ways
The total number of ways possible will be 15504 * 220 = 3410880 ways.
