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3 years ago

Paul Ehrlich update his early projections because his original ideas underestimated

Computers and Technology

1 answer:

jolli1 [7]3 years ago

8 0

Answer: The correct answer is : They underestimated the resilience of the global system

Explanation: Paul is a biologist from the United States well known for warning about the consequences of population growth and limited resources. His statement: The battle to feed all mankind is over. Affirming that in the 1970s they would starve to death despite the programs established to deal with emergencies. But this prediction proved to be incorrect.

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Write a program with a car's miles/gallon and gas dollars/gallon (both floats) as input, and output the gas cost for 10 miles, 5

omeli [17]

Answer:

The Following are the code to this question:

def cost(miles, milesPerGallon, dollarsPerGallon):##defining a method cost that accepts three parameter

return miles / milesPerGallon * dollarsPerGallon# calculate cost and return it value

milesPerGallon = float(input('Enter miles/Gallon value: '))#defining variable milesPerGallon for user input

dollarsPerGallon = float(input('Enter dollars/ Gallon value: '))#defining variable dollarsPerGallon for user input

print('{:.5f}'.format(cost(10, milesPerGallon, dollarsPerGallon)))#call method and print its value

print('{:.5f}'.format(cost(50, milesPerGallon, dollarsPerGallon)))#call method and print its value

print('{:.3f}'.format(cost(400, milesPerGallon, dollarsPerGallon)))#call method and print its value

Output:

Enter miles/Gallon value: 20.0

Enter dollars/ Gallon value: 3.1599

1.57995

7.89975

63.198

Explanation:

In the above-given code, a method "cost" is defined, that accepts three value "miles, milesPerGallon, and dollarsPerGallon" in its parameter, and use the return keyword for calculating and return its value.

In the next step, two variable "milesPerGallon, and dollarsPerGallon" is declared, that use the input method with float keyword for input floating-point value.

After input value, it uses a print method with different miles values, which are "10,50, and 400", and input value to pass in cost method to call and print its return value.

5 0

3 years ago

1. Which of the following statements is true regarding the use of refrigerants?

kondaur [170]

A) Records of the dates and quantities of refrigerant recovered and recycled are unnecessary

5 0

3 years ago

Read 2 more answers

Which of the following statements is true? Methods and instance variables can both be either public or private. Information hidi

Alex777 [14]

Answer:

Explanation:

8 0

3 years ago

What is the value of the totalsString variable after the following code is executed? var totals = [141.95, 212.95, 411, 10.95];

Alex Ar [27]

<h2>Answer:</h2>

141.95|212.95|312.95|10.95|

<h2>Explanation:</h2>

<em>Reformatting the code snippet and giving it line numbers;</em>

1. var totals = [141.95, 212.95, 411, 10.95];

2. totals[2] = 312.95;

3. var totalsString = "";

4. for (var i = 0; i < totals.length; i++) {

5. totalsString += totals[i] + "|";

6. }

Line 1 creates an array called totals with four elements.

First element = totals[0] =141.95

Second element = totals[1] = 212.95

Third element = totals[2] = 411

Fourth element = totals[3] = 10.95

Line 2 replaces the value of the third element <em>totals[2]</em> = 411 with 312.95.

Therefore the array <em>totals = </em>[141.95, 212.95, 312.95, 10.95]

Line 3 creates an empty string called totalsString

Lines 4 - 6 create a for loop that cycles from i=0 to i<totals.length

totals.length = 4 (which is the number of items in the array totals)

This means that the loop cycles from i=0 to i<4

During cycle 1 when i = 0, the expression inside the for loop executes as follows;

totalsString = totalsString + totals[0] + "|" //substitute the values

totalsString = "" + 141.95 + "|"

totalsString = 141.95|

During cycle 2 when i = 1, the expression inside the for loop executes as follows;

totalsString = totalsString + totals[1] + "|" //substitute the values

totalsString = "141.95|" + 212.95 + "|"

totalsString = 141.95|212.95|

During cycle 3 when i = 2, the expression inside the for loop executes as follows;

totalsString = totalsString + totals[2] + "|" //substitute the values

totalsString = "141.95|212.95|" + 312.95 + "|"

totalsString = 141.95|212.95|312.95|

During cycle 4 when i = 3, the expression inside the for loop executes as follows;

totalsString = totalsString + totals[3] + "|" //substitute the values

totalsString = "141.95|212.95|312.95|" + 10.95 + "|"

totalsString = 141.95|212.95|312.95|10.95|

At the end of the execution, totalsString = 141.95|212.95|312.95|10.95|

7 0

3 years ago

NEED FIVE QUESTIONS ANSWERED!!! take your time~

DochEvi [55]

I'M NOT 100% SURE i hope this helps you

4 0

3 years ago