Answer:
Cost of travel insurance for 4 days = 19 pounds
Step-by-step explanation:
The insurance company uses the formula T = 3.5n + 5 to work out the cost , T pounds for insuring the customer for n number of days . Where n is the number of days.
The algebraic equation given has two variables which are cost T of insuring and n which is the number of days for insuring. Mathematically,
T = cost of insuring in pounds
n = number of days
Therefore, finding the cost T for 4 days
T = 3.5n + 5
T = 3.5 × 4 + 5
T = 14 + 5
T = 19 pounds
Cost of travel insurance for 4 days = 19 pounds
Make XY tables for each option.
If any of the Tables have identical X numbers it is not a function.
The first option has two X's that re 2, so is not a function.
Second option has 2 x's that are 4's, so is not a function.
The third option has no repeating X values so is a function.
The fourth option has two -2's and two 0's so ids not a function.
The function is the third choice:
On a coordinate plane, solid circles appear at the following points: (negative 3, 2), (negative 2, 2), (0, 1), (1, 3), (2, negative 4), (4, negative 1).
The answer to this question would be: D.99,400 * (0.87)^t < 12,000; 16 days
In this question, the initial number of leaves is 99,400 and it will decrease by 13% each day. Decrease by 13% can be put become: 100%-13%=87% of the original number.
Then, the function for the number of the leaves should be:
99,400 * (0.87)^t
to find how many days after autumn that the tree leaves is less than 12,000 the calculation should be:
99,400* (0.87)^t <12,000
(0.87)^t< 0.1207
The smallest number would be (0.87)^16= 0.10772290133
