Julio dove into a lake that was 94 feet deep. Aliki visited last week was 4/5 as deep. How deep was the lake from last week?
If Julio dove into a lake that was 94 feet deep, Aliki's lake last week was 4/5*94 = <<4/5*94=75.2>>75.2 feet deep. Answer: \boxed{75.2}.
To find out how deep the lake was last week, we can set up a proportion using the given information.
Let's assume the depth of the lake last week is represented by "x" feet.
We know that Julio dove into a lake that was 94 feet deep, and Aliki visited a lake that was 4/5 as deep.
So, we can set up the following proportion:
94 / x = 4/5
To solve this proportion, we can cross-multiply:
94 * 5 = 4 * x
470 = 4x
Now, we can solve for x by dividing both sides of the equation by 4:
x = 470 / 4
x = 117.5
Therefore, the lake was 117.5 feet deep last week.
To find out how deep the lake was last week, you'll need to multiply the depth that Julio dove into by the fraction representing the depth of the lake compared to last week. Let's break it down step by step:
Step 1: Find the depth that Julio dove into the lake, which is 94 feet.
Step 2: Determine the fraction that represents the depth of the lake compared to last week, which is 4/5.
Step 3: Multiply the depth that Julio dove into by the fraction representing the depth of the lake compared to last week:
94 feet * (4/5) = 376/5 = 75.2 feet
Therefore, the lake's depth last week was 75.2 feet.