115 students could sign up to hear three different speakers for career day. 70 students heard the nurse speak, 52 heard the firefighter, and 78 heard the webmaster. some students heard more than one speaker. the results are shown in the table below.

number of students | speaker
15 | all three
20 | nurse and firefighter
30 | webmaster and nurse
12 | firefighter only

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

Afarmer has decided to divide his land area in half in order to plant soy and corn. calculate the area of the entire area so he knows how much soil is needed. each bag of soil covers 20 square yards. how many bags should the farmer purchase? (4 points) 1 bag 2 bags 3 bags 4 bags

At wind speeds above 1000 centimeters per second (cm/sec), significant sand-moving events begin to occur. wind speeds below 1000 cm/sec deposit sand and wind speeds above 1000 cm/sec move sand to new locations. the cyclic nature of wind and moving sand determines the shape and location of large dunes. at a test site, the prevailing direction of the wind did not change noticeably. however, the velocity did change. fifty-nine wind speed readings gave an average velocity of x = 1075 cm/sec. based on long-term experience, σ can be assumed to be 245 cm/sec. (a) find a 95% confidence interval for the population mean wind speed at this site. (round your answers to the nearest whole number.) lower limit cm/sec upper limit cm/sec