math calculators

Two cars are on the same side of a spire of height h ft. The angles of depression of these two cars from the top of the spire are φ and θ . Calculate the distance between the cars when h = 100, φ = 25° and θ = 40°. => 96 ft or 81 ft. or 334 ft. or 20 ft..

John was sick for 3 days in a particular week. Choose the number sentence to calculate n , the number of days John was not sick in that week. => 7 n = 3 or 7 - 3 = n or 3 n = 7 or 7 + 3 = n..

The diameter of a circular lawn is 18 m. Calculate its area. [Take π = 3.14.] => 254.34 m 2 or 28.26 m 2 or 1017.36 m 2 or 56.52 m 2..

Stephanie uses the expression m + 4 to calculate the amount owned by her brother, Tim, where m represents the amount owned by Stephanie. How much does Tim own if Stephanie owns $7? => $13 or $10 or $11 or $8..

Ashley uses the expression m + 5 to calculate the amount owned by her brother, Charles, where m represents the amount owned by Ashley. How much does Charles own if Ashley owns $9? => $16 or $14 or $11 or $13..

A storekeeper found 12 hats left at the store this week. His records shows that 13 hats were sold last week. Choose the number sentence to calculate h , the number of hats that were there in the store at the begining of last week. => 13 - 12 = h or 12 + 13 = h or 13 h = 12 or 12 h = 13..

Calculation of Standard Deviation for discrete series - In the discrete series, when deviations are taken from actual mean, the formula ..

John was sick for 4 days of a particular week. Choose the number sentence to calculate the number of days, n , John was not sick in that week. => 7 - 4 = n or 7 + 4 = n or 4 n = 7 or 7 n = 4..

Lily read 61 pages of a book containing 93 pages. Choose the number sentence that helps you to calculate the number of pages, n , to be read to complete the book. => 61 - n = 93 or 93 - 61 = n or 61 + 93 = n or n + 93 = 61..