Va rog rezolvati aceste exercitii va dau pana si coroana : (a:5+99:9)x(5214:33)=5530 98509-453x9+23x457=??? Suma a trei numere este 2356 Primul numar este 345,iar al doilea este dublul primului numar iar al treilea este (3912-638):89+a=121

Use the net as an aid to compute the surface area of the triangular prism. a) 550 m2 b) 614 m2 c) 670 m2 d) 790 m2

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

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