Answer:
Step-by-step explanation:
Q5) 4/9 is 0.4 recurring not just “0.4”
Q6) 6 and 7
Q7) 5.385
Answer:
The answer is = −70s+63
Step-by-step explanation:
7(1−10s+8)
=(7)(1+−10s+8)
=(7)(1)+(7)(−10s)+(7)(8)
=7−70s+56
=−70s+63
When there is a negative in squre root, it means imaginary number come in. 'i' is usually the varible used to identify imaginary numbers.
First remove the negative from the square root and find the square root of 4, which is 2. Then add i to 2. 2i
Now solve for the positive then negative.
-2 + 2i
----------- = -1 + 1i
2
-2 - 2i
----------- = -1 - 1i
2
Both -1 + 1i and -1 - 1i are the answers.
Answer: h = 137.4 metres
Step-by-step explanation:
Given that the length of the shadow of a pole on level ground increase 90m, that is, (x + 90)m will be the total length of the shadow. Also we are given that the angle of elevation of the sum changes from 58-38.
To calculate the height, we will employ trigonometry ratio. SohCahToa which are: tan 58 and tan 38.
Please find the attached files for the solution