Answer:
the answer is G) Change 30 to 3,000
Answer:
29
Step-by-step explanation:
at 9 on both sides to get m alone
-9+m=20
+9. +9
m= 29
Answer:
The first option (5.7km)
Step-by-step explanation:
Since we have a right angle triangle and we know two of its sides we can easily find out the thirds side (the value of d) by using the Pathagoras Theorem. In our case 7 and d are our legs and the hypotenuse is equal to 9, so...
(Based on the Pathagoras Theorem)
![c^{2} = a^{2} + b^{2}](https://tex.z-dn.net/?f=c%5E%7B2%7D%20%3D%20a%5E%7B2%7D%20%20%2B%20b%5E%7B2%7D)
![9^{2} = 7^{2} + d^{2}](https://tex.z-dn.net/?f=9%5E%7B2%7D%20%3D%207%5E%7B2%7D%20%2B%20d%5E%7B2%7D)
![d^{2} = 9^{2} - 7^{2} \\d^{2} = 81 - 49\\d^{2} = 32\\d = \sqrt{32}\\](https://tex.z-dn.net/?f=d%5E%7B2%7D%20%3D%209%5E%7B2%7D%20-%207%5E%7B2%7D%20%5C%5Cd%5E%7B2%7D%20%3D%2081%20-%2049%5C%5Cd%5E%7B2%7D%20%3D%2032%5C%5Cd%20%3D%20%5Csqrt%7B32%7D%5C%5C)
d ≈ 5.7km
There for aproximate distance across the lake is equal to 5.7km